21261616

素因数分解:

$2^4\times {\mathrm{41}}^1\times {\mathrm{32411}}^1$

素因数の和:32460

約数の個数: 20

約数和(自身を含む): 42200424

約数和(自身を除く): 20938808

約数列:

[1, 2, 4, 8, 16, 41, 82, 164, 328, 656, 32411, 64822, 129644, 259288, 518576, 1328851, 2657702, 5315404, 10630808, 21261616]

約数ペア:

[(1, 21261616), (2, 10630808), (4, 5315404), (8, 2657702), (16, 1328851), (41, 518576), (82, 259288), (164, 129644), (328, 64822), (656, 32411)]