18911891

素因数分解:

${\mathrm{31}}^1\times {\mathrm{61}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:302

約数の個数: 16

約数和(自身を含む): 20260608

約数和(自身を除く): 1348717

約数列:

[1, 31, 61, 73, 137, 1891, 2263, 4247, 4453, 8357, 10001, 138043, 259067, 310031, 610061, 18911891]

約数ペア:

[(1, 18911891), (31, 610061), (61, 310031), (73, 259067), (137, 138043), (1891, 10001), (2263, 8357), (4247, 4453)]