21237778

素因数分解:

$2^1\times {\mathrm{37}}^1\times {\mathrm{109}}^1\times {\mathrm{2633}}^1$

素因数の和:2781

約数の個数: 16

約数和(自身を含む): 33030360

約数和(自身を除く): 11792582

約数列:

[1, 2, 37, 74, 109, 218, 2633, 4033, 5266, 8066, 97421, 194842, 286997, 573994, 10618889, 21237778]

約数ペア:

[(1, 21237778), (2, 10618889), (37, 573994), (74, 286997), (109, 194842), (218, 97421), (2633, 8066), (4033, 5266)]