64972940

素因数分解:

$2^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{21803}}^1$

素因数の和:21961

約数の個数: 24

約数和(自身を含む): 137365200

約数和(自身を除く): 72392260

約数列:

[1, 2, 4, 5, 10, 20, 149, 298, 596, 745, 1490, 2980, 21803, 43606, 87212, 109015, 218030, 436060, 3248647, 6497294, 12994588, 16243235, 32486470, 64972940]

約数ペア:

[(1, 64972940), (2, 32486470), (4, 16243235), (5, 12994588), (10, 6497294), (20, 3248647), (149, 436060), (298, 218030), (596, 109015), (745, 87212), (1490, 43606), (2980, 21803)]