20617690

素因数分解:

$2^1\times 5^1\times {\mathrm{71}}^2\times {\mathrm{409}}^1$

素因数の和:558

約数の個数: 24

約数和(自身を含む): 37733940

約数和(自身を除く): 17116250

約数列:

[1, 2, 5, 10, 71, 142, 355, 409, 710, 818, 2045, 4090, 5041, 10082, 25205, 29039, 50410, 58078, 145195, 290390, 2061769, 4123538, 10308845, 20617690]

約数ペア:

[(1, 20617690), (2, 10308845), (5, 4123538), (10, 2061769), (71, 290390), (142, 145195), (355, 58078), (409, 50410), (710, 29039), (818, 25205), (2045, 10082), (4090, 5041)]