21288615

素因数分解:

$3^1\times 5^1\times {\mathrm{163}}^1\times {\mathrm{8707}}^1$

素因数の和:8878

約数の個数: 16

約数和(自身を含む): 34274688

約数和(自身を除く): 12986073

約数列:

[1, 3, 5, 15, 163, 489, 815, 2445, 8707, 26121, 43535, 130605, 1419241, 4257723, 7096205, 21288615]

約数ペア:

[(1, 21288615), (3, 7096205), (5, 4257723), (15, 1419241), (163, 130605), (489, 43535), (815, 26121), (2445, 8707)]