21286755

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67577}}^1$

素因数の和:67595

約数の個数: 24

約数和(自身を含む): 42168672

約数和(自身を除く): 20881917

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67577, 202731, 337885, 473039, 608193, 1013655, 1419117, 2365195, 3040965, 4257351, 7095585, 21286755]

約数ペア:

[(1, 21286755), (3, 7095585), (5, 4257351), (7, 3040965), (9, 2365195), (15, 1419117), (21, 1013655), (35, 608193), (45, 473039), (63, 337885), (105, 202731), (315, 67577)]