20512690640

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{680129}}^1$

素因数の和:680184

約数の個数: 80

約数和(自身を含む): 53131755600

約数和(自身を除く): 32619064960

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 29, 40, 52, 58, 65, 80, 104, 116, 130, 145, 208, 232, 260, 290, 377, 464, 520, 580, 754, 1040, 1160, 1508, 1885, 2320, 3016, 3770, 6032, 7540, 15080, 30160, 680129, 1360258, 2720516, 3400645, 5441032, 6801290, 8841677, 10882064, 13602580, 17683354, 19723741, 27205160, 35366708, 39447482, 44208385, 54410320, 70733416, 78894964, 88416770, 98618705, 141466832, 157789928, 176833540, 197237410, 256408633, 315579856, 353667080, 394474820, 512817266, 707334160, 788949640, 1025634532, 1282043165, 1577899280, 2051269064, 2564086330, 4102538128, 5128172660, 10256345320, 20512690640]

約数ペア:

[(1, 20512690640), (2, 10256345320), (4, 5128172660), (5, 4102538128), (8, 2564086330), (10, 2051269064), (13, 1577899280), (16, 1282043165), (20, 1025634532), (26, 788949640), (29, 707334160), (40, 512817266), (52, 394474820), (58, 353667080), (65, 315579856), (80, 256408633), (104, 197237410), (116, 176833540), (130, 157789928), (145, 141466832), (208, 98618705), (232, 88416770), (260, 78894964), (290, 70733416), (377, 54410320), (464, 44208385), (520, 39447482), (580, 35366708), (754, 27205160), (1040, 19723741), (1160, 17683354), (1508, 13602580), (1885, 10882064), (2320, 8841677), (3016, 6801290), (3770, 5441032), (6032, 3400645), (7540, 2720516), (15080, 1360258), (30160, 680129)]