21978106

素因数分解:

$2^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1\times {\mathrm{557}}^1$

素因数の和:849

約数の個数: 16

約数和(自身を含む): 33513480

約数和(自身を除く): 11535374

約数列:

[1, 2, 109, 181, 218, 362, 557, 1114, 19729, 39458, 60713, 100817, 121426, 201634, 10989053, 21978106]

約数ペア:

[(1, 21978106), (2, 10989053), (109, 201634), (181, 121426), (218, 100817), (362, 60713), (557, 39458), (1114, 19729)]