19109980

素因数分解:

$2^2\times 5^1\times {\mathrm{181}}^1\times {\mathrm{5279}}^1$

素因数の和:5469

約数の個数: 24

約数和(自身を含む): 40360320

約数和(自身を除く): 21250340

約数列:

[1, 2, 4, 5, 10, 20, 181, 362, 724, 905, 1810, 3620, 5279, 10558, 21116, 26395, 52790, 105580, 955499, 1910998, 3821996, 4777495, 9554990, 19109980]

約数ペア:

[(1, 19109980), (2, 9554990), (4, 4777495), (5, 3821996), (10, 1910998), (20, 955499), (181, 105580), (362, 52790), (724, 26395), (905, 21116), (1810, 10558), (3620, 5279)]