80327980

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{56569}}^1$

素因数の和:56649

約数の個数: 24

約数和(自身を含む): 171067680

約数和(自身を除く): 90739700

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 56569, 113138, 226276, 282845, 565690, 1131380, 4016399, 8032798, 16065596, 20081995, 40163990, 80327980]

約数ペア:

[(1, 80327980), (2, 40163990), (4, 20081995), (5, 16065596), (10, 8032798), (20, 4016399), (71, 1131380), (142, 565690), (284, 282845), (355, 226276), (710, 113138), (1420, 56569)]