81705640

素因数分解:

$2^3\times 5^1\times {\mathrm{149}}^1\times {\mathrm{13709}}^1$

素因数の和:13869

約数の個数: 32

約数和(自身を含む): 185085000

約数和(自身を除く): 103379360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 149, 298, 596, 745, 1192, 1490, 2980, 5960, 13709, 27418, 54836, 68545, 109672, 137090, 274180, 548360, 2042641, 4085282, 8170564, 10213205, 16341128, 20426410, 40852820, 81705640]

約数ペア:

[(1, 81705640), (2, 40852820), (4, 20426410), (5, 16341128), (8, 10213205), (10, 8170564), (20, 4085282), (40, 2042641), (149, 548360), (298, 274180), (596, 137090), (745, 109672), (1192, 68545), (1490, 54836), (2980, 27418), (5960, 13709)]