20961580

素因数分解:

$2^2\times 5^1\times {\mathrm{31}}^1\times {\mathrm{33809}}^1$

素因数の和:33849

約数の個数: 24

約数和(自身を含む): 45440640

約数和(自身を除く): 24479060

約数列:

[1, 2, 4, 5, 10, 20, 31, 62, 124, 155, 310, 620, 33809, 67618, 135236, 169045, 338090, 676180, 1048079, 2096158, 4192316, 5240395, 10480790, 20961580]

約数ペア:

[(1, 20961580), (2, 10480790), (4, 5240395), (5, 4192316), (10, 2096158), (20, 1048079), (31, 676180), (62, 338090), (124, 169045), (155, 135236), (310, 67618), (620, 33809)]