2181980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{1381}}^1$

素因数の和:1469

約数の個数: 24

約数和(自身を含む): 4643520

約数和(自身を除く): 2461540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1381, 1580, 2762, 5524, 6905, 13810, 27620, 109099, 218198, 436396, 545495, 1090990, 2181980]

約数ペア:

[(1, 2181980), (2, 1090990), (4, 545495), (5, 436396), (10, 218198), (20, 109099), (79, 27620), (158, 13810), (316, 6905), (395, 5524), (790, 2762), (1381, 1580)]