19978418

素因数分解:

$2^1\times {\mathrm{181}}^1\times {\mathrm{229}}^1\times {\mathrm{241}}^1$

素因数の和:653

約数の個数: 16

約数和(自身を含む): 30390360

約数和(自身を除く): 10411942

約数列:

[1, 2, 181, 229, 241, 362, 458, 482, 41449, 43621, 55189, 82898, 87242, 110378, 9989209, 19978418]

約数ペア:

[(1, 19978418), (2, 9989209), (181, 110378), (229, 87242), (241, 82898), (362, 55189), (458, 43621), (482, 41449)]