19878781

素因数分解:

${\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{461}}^1$

素因数の和:612

約数の個数: 16

約数和(自身を含む): 22353408

約数和(自身を除く): 2474627

約数列:

[1, 13, 31, 107, 403, 461, 1391, 3317, 5993, 14291, 43121, 49327, 185783, 641251, 1529137, 19878781]

約数ペア:

[(1, 19878781), (13, 1529137), (31, 641251), (107, 185783), (403, 49327), (461, 43121), (1391, 14291), (3317, 5993)]