657940

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{491}}^1$

素因数の和:567

約数の個数: 24

約数和(自身を含む): 1405152

約数和(自身を除く): 747212

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 491, 670, 982, 1340, 1964, 2455, 4910, 9820, 32897, 65794, 131588, 164485, 328970, 657940]

約数ペア:

[(1, 657940), (2, 328970), (4, 164485), (5, 131588), (10, 65794), (20, 32897), (67, 9820), (134, 4910), (268, 2455), (335, 1964), (491, 1340), (670, 982)]