161778020

素因数分解:

$2^2\times 5^1\times {\mathrm{1231}}^1\times {\mathrm{6571}}^1$

素因数の和:7811

約数の個数: 24

約数和(自身を含む): 340061568

約数和(自身を除く): 178283548

約数列:

[1, 2, 4, 5, 10, 20, 1231, 2462, 4924, 6155, 6571, 12310, 13142, 24620, 26284, 32855, 65710, 131420, 8088901, 16177802, 32355604, 40444505, 80889010, 161778020]

約数ペア:

[(1, 161778020), (2, 80889010), (4, 40444505), (5, 32355604), (10, 16177802), (20, 8088901), (1231, 131420), (2462, 65710), (4924, 32855), (6155, 26284), (6571, 24620), (12310, 13142)]