19965980

素因数分解:

$2^2\times 5^1\times {\mathrm{823}}^1\times {\mathrm{1213}}^1$

素因数の和:2045

約数の個数: 24

約数和(自身を含む): 42014112

約数和(自身を除く): 22048132

約数列:

[1, 2, 4, 5, 10, 20, 823, 1213, 1646, 2426, 3292, 4115, 4852, 6065, 8230, 12130, 16460, 24260, 998299, 1996598, 3993196, 4991495, 9982990, 19965980]

約数ペア:

[(1, 19965980), (2, 9982990), (4, 4991495), (5, 3993196), (10, 1996598), (20, 998299), (823, 24260), (1213, 16460), (1646, 12130), (2426, 8230), (3292, 6065), (4115, 4852)]