640146780

素因数分解:

$2^2\times 3^3\times 5^1\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1861}}^1$

素因数の和:1906

約数の個数: 288

約数和(自身を含む): 2496271680

約数和(自身を除く): 1856124900

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 13, 14, 15, 18, 20, 21, 26, 27, 28, 30, 35, 36, 39, 42, 45, 49, 52, 54, 60, 63, 65, 70, 78, 84, 90, 91, 98, 105, 108, 117, 126, 130, 135, 140, 147, 156, 180, 182, 189, 195, 196, 210, 234, 245, 252, 260, 270, 273, 294, 315, 351, 364, 378, 390, 420, 441, 455, 468, 490, 540, 546, 585, 588, 630, 637, 702, 735, 756, 780, 819, 882, 910, 945, 980, 1092, 1170, 1260, 1274, 1323, 1365, 1404, 1470, 1638, 1755, 1764, 1820, 1861, 1890, 1911, 2205, 2340, 2457, 2548, 2646, 2730, 2940, 3185, 3276, 3510, 3722, 3780, 3822, 4095, 4410, 4914, 5292, 5460, 5583, 5733, 6370, 6615, 7020, 7444, 7644, 8190, 8820, 9305, 9555, 9828, 11166, 11466, 12285, 12740, 13027, 13230, 16380, 16749, 17199, 18610, 19110, 22332, 22932, 24193, 24570, 26054, 26460, 27915, 28665, 33498, 34398, 37220, 38220, 39081, 48386, 49140, 50247, 52108, 55830, 57330, 65135, 66996, 68796, 72579, 78162, 83745, 85995, 91189, 96772, 100494, 111660, 114660, 117243, 120965, 130270, 145158, 156324, 167490, 169351, 171990, 182378, 195405, 200988, 217737, 234486, 241930, 251235, 260540, 273567, 290316, 334980, 338702, 343980, 351729, 362895, 364756, 390810, 435474, 455945, 468972, 483860, 502470, 508053, 547134, 586215, 653211, 677404, 703458, 725790, 781620, 820701, 846755, 870948, 911890, 1004940, 1016106, 1088685, 1094268, 1172430, 1185457, 1306422, 1367835, 1406916, 1451580, 1524159, 1641402, 1693510, 1758645, 1823780, 2032212, 2177370, 2344860, 2370914, 2462103, 2540265, 2612844, 2735670, 3048318, 3266055, 3282804, 3387020, 3517290, 3556371, 4103505, 4354740, 4572477, 4741828, 4924206, 5080530, 5471340, 5927285, 6096636, 6532110, 7034580, 7112742, 7620795, 8207010, 9144954, 9848412, 10161060, 10669113, 11854570, 12310515, 13064220, 14225484, 15241590, 16414020, 17781855, 18289908, 21338226, 22862385, 23709140, 24621030, 30483180, 32007339, 35563710, 42676452, 45724770, 49242060, 53345565, 64014678, 71127420, 91449540, 106691130, 128029356, 160036695, 213382260, 320073390, 640146780]

約数ペア:

[(1, 640146780), (2, 320073390), (3, 213382260), (4, 160036695), (5, 128029356), (6, 106691130), (7, 91449540), (9, 71127420), (10, 64014678), (12, 53345565), (13, 49242060), (14, 45724770), (15, 42676452), (18, 35563710), (20, 32007339), (21, 30483180), (26, 24621030), (27, 23709140), (28, 22862385), (30, 21338226), (35, 18289908), (36, 17781855), (39, 16414020), (42, 15241590), (45, 14225484), (49, 13064220), (52, 12310515), (54, 11854570), (60, 10669113), (63, 10161060), (65, 9848412), (70, 9144954), (78, 8207010), (84, 7620795), (90, 7112742), (91, 7034580), (98, 6532110), (105, 6096636), (108, 5927285), (117, 5471340), (126, 5080530), (130, 4924206), (135, 4741828), (140, 4572477), (147, 4354740), (156, 4103505), (180, 3556371), (182, 3517290), (189, 3387020), (195, 3282804), (196, 3266055), (210, 3048318), (234, 2735670), (245, 2612844), (252, 2540265), (260, 2462103), (270, 2370914), (273, 2344860), (294, 2177370), (315, 2032212), (351, 1823780), (364, 1758645), (378, 1693510), (390, 1641402), (420, 1524159), (441, 1451580), (455, 1406916), (468, 1367835), (490, 1306422), (540, 1185457), (546, 1172430), (585, 1094268), (588, 1088685), (630, 1016106), (637, 1004940), (702, 911890), (735, 870948), (756, 846755), (780, 820701), (819, 781620), (882, 725790), (910, 703458), (945, 677404), (980, 653211), (1092, 586215), (1170, 547134), (1260, 508053), (1274, 502470), (1323, 483860), (1365, 468972), (1404, 455945), (1470, 435474), (1638, 390810), (1755, 364756), (1764, 362895), (1820, 351729), (1861, 343980), (1890, 338702), (1911, 334980), (2205, 290316), (2340, 273567), (2457, 260540), (2548, 251235), (2646, 241930), (2730, 234486), (2940, 217737), (3185, 200988), (3276, 195405), (3510, 182378), (3722, 171990), (3780, 169351), (3822, 167490), (4095, 156324), (4410, 145158), (4914, 130270), (5292, 120965), (5460, 117243), (5583, 114660), (5733, 111660), (6370, 100494), (6615, 96772), (7020, 91189), (7444, 85995), (7644, 83745), (8190, 78162), (8820, 72579), (9305, 68796), (9555, 66996), (9828, 65135), (11166, 57330), (11466, 55830), (12285, 52108), (12740, 50247), (13027, 49140), (13230, 48386), (16380, 39081), (16749, 38220), (17199, 37220), (18610, 34398), (19110, 33498), (22332, 28665), (22932, 27915), (24193, 26460), (24570, 26054)]