21220190

素因数分解:

$2^1\times 5^1\times {\mathrm{79}}^1\times {\mathrm{26861}}^1$

素因数の和:26947

約数の個数: 16

約数和(自身を含む): 38681280

約数和(自身を除く): 17461090

約数列:

[1, 2, 5, 10, 79, 158, 395, 790, 26861, 53722, 134305, 268610, 2122019, 4244038, 10610095, 21220190]

約数ペア:

[(1, 21220190), (2, 10610095), (5, 4244038), (10, 2122019), (79, 268610), (158, 134305), (395, 53722), (790, 26861)]