81865660

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{67103}}^1$

素因数の和:67173

約数の個数: 24

約数和(自身を含む): 174738816

約数和(自身を除く): 92873156

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 67103, 134206, 268412, 335515, 671030, 1342060, 4093283, 8186566, 16373132, 20466415, 40932830, 81865660]

約数ペア:

[(1, 81865660), (2, 40932830), (4, 20466415), (5, 16373132), (10, 8186566), (20, 4093283), (61, 1342060), (122, 671030), (244, 335515), (305, 268412), (610, 134206), (1220, 67103)]