21605390

素因数分解:

$2^1\times 5^1\times {\mathrm{1451}}^1\times {\mathrm{1489}}^1$

素因数の和:2947

約数の個数: 16

約数和(自身を含む): 38942640

約数和(自身を除く): 17337250

約数列:

[1, 2, 5, 10, 1451, 1489, 2902, 2978, 7255, 7445, 14510, 14890, 2160539, 4321078, 10802695, 21605390]

約数ペア:

[(1, 21605390), (2, 10802695), (5, 4321078), (10, 2160539), (1451, 14890), (1489, 14510), (2902, 7445), (2978, 7255)]