640822980

素因数分解:

$2^2\times 3^1\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{43}}^1\times {\mathrm{137}}^1$

素因数の和:243

約数の個数: 288

約数和(自身を含む): 2209527936

約数和(自身を除く): 1568704956

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 37, 42, 43, 49, 60, 70, 74, 84, 86, 98, 105, 111, 129, 137, 140, 147, 148, 172, 185, 196, 210, 215, 222, 245, 258, 259, 274, 294, 301, 370, 411, 420, 430, 444, 490, 516, 518, 548, 555, 588, 602, 645, 685, 735, 740, 777, 822, 860, 903, 959, 980, 1036, 1110, 1204, 1290, 1295, 1370, 1470, 1505, 1554, 1591, 1644, 1806, 1813, 1918, 2055, 2107, 2220, 2580, 2590, 2740, 2877, 2940, 3010, 3108, 3182, 3612, 3626, 3836, 3885, 4110, 4214, 4515, 4773, 4795, 5069, 5180, 5439, 5754, 5891, 6020, 6321, 6364, 6713, 7252, 7770, 7955, 8220, 8428, 9030, 9065, 9546, 9590, 10138, 10535, 10878, 11137, 11508, 11782, 12642, 13426, 14385, 15207, 15540, 15910, 17673, 18060, 18130, 19092, 19180, 20139, 20276, 21070, 21756, 22274, 23564, 23865, 25284, 25345, 26852, 27195, 28770, 29455, 30414, 31605, 31820, 33411, 33565, 35346, 35483, 36260, 40278, 41237, 42140, 44548, 47730, 50690, 54390, 55685, 57540, 58910, 60828, 63210, 66822, 67130, 70692, 70966, 76035, 77959, 80556, 82474, 88365, 95460, 100695, 101380, 106449, 108780, 111370, 117820, 123711, 126420, 133644, 134260, 141932, 152070, 155918, 164948, 167055, 176730, 177415, 201390, 206185, 212898, 217967, 222740, 233877, 247422, 248381, 288659, 304140, 311836, 334110, 353460, 354830, 389795, 402780, 412370, 425796, 435934, 467754, 494844, 496762, 532245, 577318, 618555, 653901, 668220, 709660, 745143, 779590, 824740, 865977, 871868, 935508, 993524, 1064490, 1089835, 1154636, 1169385, 1237110, 1241905, 1307802, 1443295, 1490286, 1525769, 1559180, 1731954, 2128980, 2179670, 2338770, 2474220, 2483810, 2615604, 2886590, 2980572, 3051538, 3269505, 3463908, 3725715, 4329885, 4359340, 4577307, 4677540, 4967620, 5773180, 6103076, 6539010, 7451430, 7628845, 8659770, 9154614, 10680383, 13078020, 14902860, 15257690, 17319540, 18309228, 21360766, 22886535, 30515380, 32041149, 42721532, 45773070, 53401915, 64082298, 91546140, 106803830, 128164596, 160205745, 213607660, 320411490, 640822980]

約数ペア:

[(1, 640822980), (2, 320411490), (3, 213607660), (4, 160205745), (5, 128164596), (6, 106803830), (7, 91546140), (10, 64082298), (12, 53401915), (14, 45773070), (15, 42721532), (20, 32041149), (21, 30515380), (28, 22886535), (30, 21360766), (35, 18309228), (37, 17319540), (42, 15257690), (43, 14902860), (49, 13078020), (60, 10680383), (70, 9154614), (74, 8659770), (84, 7628845), (86, 7451430), (98, 6539010), (105, 6103076), (111, 5773180), (129, 4967620), (137, 4677540), (140, 4577307), (147, 4359340), (148, 4329885), (172, 3725715), (185, 3463908), (196, 3269505), (210, 3051538), (215, 2980572), (222, 2886590), (245, 2615604), (258, 2483810), (259, 2474220), (274, 2338770), (294, 2179670), (301, 2128980), (370, 1731954), (411, 1559180), (420, 1525769), (430, 1490286), (444, 1443295), (490, 1307802), (516, 1241905), (518, 1237110), (548, 1169385), (555, 1154636), (588, 1089835), (602, 1064490), (645, 993524), (685, 935508), (735, 871868), (740, 865977), (777, 824740), (822, 779590), (860, 745143), (903, 709660), (959, 668220), (980, 653901), (1036, 618555), (1110, 577318), (1204, 532245), (1290, 496762), (1295, 494844), (1370, 467754), (1470, 435934), (1505, 425796), (1554, 412370), (1591, 402780), (1644, 389795), (1806, 354830), (1813, 353460), (1918, 334110), (2055, 311836), (2107, 304140), (2220, 288659), (2580, 248381), (2590, 247422), (2740, 233877), (2877, 222740), (2940, 217967), (3010, 212898), (3108, 206185), (3182, 201390), (3612, 177415), (3626, 176730), (3836, 167055), (3885, 164948), (4110, 155918), (4214, 152070), (4515, 141932), (4773, 134260), (4795, 133644), (5069, 126420), (5180, 123711), (5439, 117820), (5754, 111370), (5891, 108780), (6020, 106449), (6321, 101380), (6364, 100695), (6713, 95460), (7252, 88365), (7770, 82474), (7955, 80556), (8220, 77959), (8428, 76035), (9030, 70966), (9065, 70692), (9546, 67130), (9590, 66822), (10138, 63210), (10535, 60828), (10878, 58910), (11137, 57540), (11508, 55685), (11782, 54390), (12642, 50690), (13426, 47730), (14385, 44548), (15207, 42140), (15540, 41237), (15910, 40278), (17673, 36260), (18060, 35483), (18130, 35346), (19092, 33565), (19180, 33411), (20139, 31820), (20276, 31605), (21070, 30414), (21756, 29455), (22274, 28770), (23564, 27195), (23865, 26852), (25284, 25345)]