19919855

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{241}}^1\times {\mathrm{271}}^1$

素因数の和:578

約数の個数: 16

約数和(自身を含む): 24486528

約数和(自身を除く): 4566673

約数列:

[1, 5, 61, 241, 271, 305, 1205, 1355, 14701, 16531, 65311, 73505, 82655, 326555, 3983971, 19919855]

約数ペア:

[(1, 19919855), (5, 3983971), (61, 326555), (241, 82655), (271, 73505), (305, 65311), (1205, 16531), (1355, 14701)]