81617980

素因数分解:

$2^2\times 5^1\times {\mathrm{331}}^1\times {\mathrm{12329}}^1$

素因数の和:12669

約数の個数: 24

約数和(自身を含む): 171929520

約数和(自身を除く): 90311540

約数列:

[1, 2, 4, 5, 10, 20, 331, 662, 1324, 1655, 3310, 6620, 12329, 24658, 49316, 61645, 123290, 246580, 4080899, 8161798, 16323596, 20404495, 40808990, 81617980]

約数ペア:

[(1, 81617980), (2, 40808990), (4, 20404495), (5, 16323596), (10, 8161798), (20, 4080899), (331, 246580), (662, 123290), (1324, 61645), (1655, 49316), (3310, 24658), (6620, 12329)]