21870790

素因数分解:

$2^1\times 5^1\times {\mathrm{449}}^1\times {\mathrm{4871}}^1$

素因数の和:5327

約数の個数: 16

約数和(自身を含む): 39463200

約数和(自身を除く): 17592410

約数列:

[1, 2, 5, 10, 449, 898, 2245, 4490, 4871, 9742, 24355, 48710, 2187079, 4374158, 10935395, 21870790]

約数ペア:

[(1, 21870790), (2, 10935395), (5, 4374158), (10, 2187079), (449, 48710), (898, 24355), (2245, 9742), (4490, 4871)]