628984540

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{78427}}^1$

素因数の和:78837

約数の個数: 24

約数和(自身を含む): 1324178352

約数和(自身を除く): 695193812

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 78427, 156854, 313708, 392135, 784270, 1568540, 31449227, 62898454, 125796908, 157246135, 314492270, 628984540]

約数ペア:

[(1, 628984540), (2, 314492270), (4, 157246135), (5, 125796908), (10, 62898454), (20, 31449227), (401, 1568540), (802, 784270), (1604, 392135), (2005, 313708), (4010, 156854), (8020, 78427)]