20193980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{12781}}^1$

素因数の和:12869

約数の個数: 24

約数和(自身を含む): 42947520

約数和(自身を除く): 22753540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 12781, 25562, 51124, 63905, 127810, 255620, 1009699, 2019398, 4038796, 5048495, 10096990, 20193980]

約数ペア:

[(1, 20193980), (2, 10096990), (4, 5048495), (5, 4038796), (10, 2019398), (20, 1009699), (79, 255620), (158, 127810), (316, 63905), (395, 51124), (790, 25562), (1580, 12781)]