21804225

素因数分解:

$3^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{6761}}^1$

素因数の和:6817

約数の個数: 24

約数和(自身を含む): 36893472

約数和(自身を除く): 15089247

約数列:

[1, 3, 5, 15, 25, 43, 75, 129, 215, 645, 1075, 3225, 6761, 20283, 33805, 101415, 169025, 290723, 507075, 872169, 1453615, 4360845, 7268075, 21804225]

約数ペア:

[(1, 21804225), (3, 7268075), (5, 4360845), (15, 1453615), (25, 872169), (43, 507075), (75, 290723), (129, 169025), (215, 101415), (645, 33805), (1075, 20283), (3225, 6761)]