21025845

素因数分解:

$3^3\times 5^1\times {\mathrm{155747}}^1$

素因数の和:155761

約数の個数: 16

約数和(自身を含む): 37379520

約数和(自身を除く): 16353675

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155747, 467241, 778735, 1401723, 2336205, 4205169, 7008615, 21025845]

約数ペア:

[(1, 21025845), (3, 7008615), (5, 4205169), (9, 2336205), (15, 1401723), (27, 778735), (45, 467241), (135, 155747)]