20810180

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{13171}}^1$

素因数の和:13259

約数の個数: 24

約数和(自身を含む): 44257920

約数和(自身を除く): 23447740

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 13171, 26342, 52684, 65855, 131710, 263420, 1040509, 2081018, 4162036, 5202545, 10405090, 20810180]

約数ペア:

[(1, 20810180), (2, 10405090), (4, 5202545), (5, 4162036), (10, 2081018), (20, 1040509), (79, 263420), (158, 131710), (316, 65855), (395, 52684), (790, 26342), (1580, 13171)]