21204075

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{9749}}^1$

素因数の和:9791

約数の個数: 24

約数和(自身を含む): 36270000

約数和(自身を除く): 15065925

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175, 9749, 29247, 48745, 146235, 243725, 282721, 731175, 848163, 1413605, 4240815, 7068025, 21204075]

約数ペア:

[(1, 21204075), (3, 7068025), (5, 4240815), (15, 1413605), (25, 848163), (29, 731175), (75, 282721), (87, 243725), (145, 146235), (435, 48745), (725, 29247), (2175, 9749)]