21115580

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^2\times {\mathrm{571}}^1$

素因数の和:666

約数の個数: 36

約数和(自身を含む): 45477432

約数和(自身を除く): 24361852

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 571, 860, 1142, 1849, 2284, 2855, 3698, 5710, 7396, 9245, 11420, 18490, 24553, 36980, 49106, 98212, 122765, 245530, 491060, 1055779, 2111558, 4223116, 5278895, 10557790, 21115580]

約数ペア:

[(1, 21115580), (2, 10557790), (4, 5278895), (5, 4223116), (10, 2111558), (20, 1055779), (43, 491060), (86, 245530), (172, 122765), (215, 98212), (430, 49106), (571, 36980), (860, 24553), (1142, 18490), (1849, 11420), (2284, 9245), (2855, 7396), (3698, 5710)]