21282965680

素因数分解:

$2^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{71}}^1\times {\mathrm{120871}}^1$

素因数の和:120986

約数の個数: 80

約数和(自身を含む): 51798970368

約数和(自身を除く): 30516004688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 40, 62, 71, 80, 124, 142, 155, 248, 284, 310, 355, 496, 568, 620, 710, 1136, 1240, 1420, 2201, 2480, 2840, 4402, 5680, 8804, 11005, 17608, 22010, 35216, 44020, 88040, 120871, 176080, 241742, 483484, 604355, 966968, 1208710, 1933936, 2417420, 3747001, 4834840, 7494002, 8581841, 9669680, 14988004, 17163682, 18735005, 29976008, 34327364, 37470010, 42909205, 59952016, 68654728, 74940020, 85818410, 137309456, 149880040, 171636820, 266037071, 299760080, 343273640, 532074142, 686547280, 1064148284, 1330185355, 2128296568, 2660370710, 4256593136, 5320741420, 10641482840, 21282965680]

約数ペア:

[(1, 21282965680), (2, 10641482840), (4, 5320741420), (5, 4256593136), (8, 2660370710), (10, 2128296568), (16, 1330185355), (20, 1064148284), (31, 686547280), (40, 532074142), (62, 343273640), (71, 299760080), (80, 266037071), (124, 171636820), (142, 149880040), (155, 137309456), (248, 85818410), (284, 74940020), (310, 68654728), (355, 59952016), (496, 42909205), (568, 37470010), (620, 34327364), (710, 29976008), (1136, 18735005), (1240, 17163682), (1420, 14988004), (2201, 9669680), (2480, 8581841), (2840, 7494002), (4402, 4834840), (5680, 3747001), (8804, 2417420), (11005, 1933936), (17608, 1208710), (22010, 966968), (35216, 604355), (44020, 483484), (88040, 241742), (120871, 176080)]