19403980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12281}}^1$

素因数の和:12369

約数の個数: 24

約数和(自身を含む): 41267520

約数和(自身を除く): 21863540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12281, 24562, 49124, 61405, 122810, 245620, 970199, 1940398, 3880796, 4850995, 9701990, 19403980]

約数ペア:

[(1, 19403980), (2, 9701990), (4, 4850995), (5, 3880796), (10, 1940398), (20, 970199), (79, 245620), (158, 122810), (316, 61405), (395, 49124), (790, 24562), (1580, 12281)]