20100780

素因数分解:

$2^2\times 3^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1$

素因数の和:125

約数の個数: 216

約数和(自身を含む): 73945872

約数和(自身を除く): 53845092

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 43, 45, 49, 53, 60, 63, 70, 84, 86, 90, 98, 105, 106, 126, 129, 140, 147, 159, 172, 180, 196, 210, 212, 215, 245, 252, 258, 265, 294, 301, 315, 318, 371, 387, 420, 430, 441, 477, 490, 516, 530, 588, 602, 630, 636, 645, 735, 742, 774, 795, 860, 882, 903, 954, 980, 1060, 1113, 1204, 1260, 1290, 1470, 1484, 1505, 1548, 1590, 1764, 1806, 1855, 1908, 1935, 2107, 2205, 2226, 2279, 2385, 2580, 2597, 2709, 2940, 3010, 3180, 3339, 3612, 3710, 3870, 4214, 4410, 4452, 4515, 4558, 4770, 5194, 5418, 5565, 6020, 6321, 6678, 6837, 7420, 7740, 7791, 8428, 8820, 9030, 9116, 9540, 10388, 10535, 10836, 11130, 11395, 12642, 12985, 13356, 13545, 13674, 15582, 15953, 16695, 18060, 18963, 20511, 21070, 22260, 22790, 23373, 25284, 25970, 27090, 27348, 31164, 31605, 31906, 33390, 34185, 37926, 38955, 41022, 42140, 45580, 46746, 47859, 51940, 54180, 63210, 63812, 66780, 68370, 75852, 77910, 79765, 82044, 93492, 94815, 95718, 102555, 111671, 116865, 126420, 136740, 143577, 155820, 159530, 189630, 191436, 205110, 223342, 233730, 239295, 287154, 319060, 335013, 379260, 410220, 446684, 467460, 478590, 558355, 574308, 670026, 717885, 957180, 1005039, 1116710, 1340052, 1435770, 1675065, 2010078, 2233420, 2871540, 3350130, 4020156, 5025195, 6700260, 10050390, 20100780]

約数ペア:

[(1, 20100780), (2, 10050390), (3, 6700260), (4, 5025195), (5, 4020156), (6, 3350130), (7, 2871540), (9, 2233420), (10, 2010078), (12, 1675065), (14, 1435770), (15, 1340052), (18, 1116710), (20, 1005039), (21, 957180), (28, 717885), (30, 670026), (35, 574308), (36, 558355), (42, 478590), (43, 467460), (45, 446684), (49, 410220), (53, 379260), (60, 335013), (63, 319060), (70, 287154), (84, 239295), (86, 233730), (90, 223342), (98, 205110), (105, 191436), (106, 189630), (126, 159530), (129, 155820), (140, 143577), (147, 136740), (159, 126420), (172, 116865), (180, 111671), (196, 102555), (210, 95718), (212, 94815), (215, 93492), (245, 82044), (252, 79765), (258, 77910), (265, 75852), (294, 68370), (301, 66780), (315, 63812), (318, 63210), (371, 54180), (387, 51940), (420, 47859), (430, 46746), (441, 45580), (477, 42140), (490, 41022), (516, 38955), (530, 37926), (588, 34185), (602, 33390), (630, 31906), (636, 31605), (645, 31164), (735, 27348), (742, 27090), (774, 25970), (795, 25284), (860, 23373), (882, 22790), (903, 22260), (954, 21070), (980, 20511), (1060, 18963), (1113, 18060), (1204, 16695), (1260, 15953), (1290, 15582), (1470, 13674), (1484, 13545), (1505, 13356), (1548, 12985), (1590, 12642), (1764, 11395), (1806, 11130), (1855, 10836), (1908, 10535), (1935, 10388), (2107, 9540), (2205, 9116), (2226, 9030), (2279, 8820), (2385, 8428), (2580, 7791), (2597, 7740), (2709, 7420), (2940, 6837), (3010, 6678), (3180, 6321), (3339, 6020), (3612, 5565), (3710, 5418), (3870, 5194), (4214, 4770), (4410, 4558), (4452, 4515)]