20783122840

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{2251}}^1\times {\mathrm{3251}}^1$

素因数の和:5584

約数の個数: 64

約数和(自身を含む): 47456305920

約数和(自身を除く): 26673183080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2251, 2840, 3251, 4502, 6502, 9004, 11255, 13004, 16255, 18008, 22510, 26008, 32510, 45020, 65020, 90040, 130040, 159821, 230821, 319642, 461642, 639284, 799105, 923284, 1154105, 1278568, 1598210, 1846568, 2308210, 3196420, 4616420, 6392840, 7318001, 9232840, 14636002, 29272004, 36590005, 58544008, 73180010, 146360020, 292720040, 519578071, 1039156142, 2078312284, 2597890355, 4156624568, 5195780710, 10391561420, 20783122840]

約数ペア:

[(1, 20783122840), (2, 10391561420), (4, 5195780710), (5, 4156624568), (8, 2597890355), (10, 2078312284), (20, 1039156142), (40, 519578071), (71, 292720040), (142, 146360020), (284, 73180010), (355, 58544008), (568, 36590005), (710, 29272004), (1420, 14636002), (2251, 9232840), (2840, 7318001), (3251, 6392840), (4502, 4616420), (6502, 3196420), (9004, 2308210), (11255, 1846568), (13004, 1598210), (16255, 1278568), (18008, 1154105), (22510, 923284), (26008, 799105), (32510, 639284), (45020, 461642), (65020, 319642), (90040, 230821), (130040, 159821)]