8478820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{853}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 20659968

約数和(自身を除く): 12181148

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 71, 140, 142, 284, 355, 497, 710, 853, 994, 1420, 1706, 1988, 2485, 3412, 4265, 4970, 5971, 8530, 9940, 11942, 17060, 23884, 29855, 59710, 60563, 119420, 121126, 242252, 302815, 423941, 605630, 847882, 1211260, 1695764, 2119705, 4239410, 8478820]

約数ペア:

[(1, 8478820), (2, 4239410), (4, 2119705), (5, 1695764), (7, 1211260), (10, 847882), (14, 605630), (20, 423941), (28, 302815), (35, 242252), (70, 121126), (71, 119420), (140, 60563), (142, 59710), (284, 29855), (355, 23884), (497, 17060), (710, 11942), (853, 9940), (994, 8530), (1420, 5971), (1706, 4970), (1988, 4265), (2485, 3412)]