21561345

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36857}}^1$

素因数の和:36881

約数の個数: 24

約数和(自身を含む): 40248936

約数和(自身を除く): 18687591

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36857, 110571, 184285, 331713, 479141, 552855, 1437423, 1658565, 2395705, 4312269, 7187115, 21561345]

約数ペア:

[(1, 21561345), (3, 7187115), (5, 4312269), (9, 2395705), (13, 1658565), (15, 1437423), (39, 552855), (45, 479141), (65, 331713), (117, 184285), (195, 110571), (585, 36857)]