81624920

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{156971}}^1$

素因数の和:156995

約数の個数: 32

約数和(自身を含む): 197784720

約数和(自身を除く): 116159800

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 156971, 313942, 627884, 784855, 1255768, 1569710, 2040623, 3139420, 4081246, 6278840, 8162492, 10203115, 16324984, 20406230, 40812460, 81624920]

約数ペア:

[(1, 81624920), (2, 40812460), (4, 20406230), (5, 16324984), (8, 10203115), (10, 8162492), (13, 6278840), (20, 4081246), (26, 3139420), (40, 2040623), (52, 1569710), (65, 1255768), (104, 784855), (130, 627884), (260, 313942), (520, 156971)]