21201705

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{67307}}^1$

素因数の和:67325

約数の個数: 24

約数和(自身を含む): 42000192

約数和(自身を除く): 20798487

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 67307, 201921, 336535, 471149, 605763, 1009605, 1413447, 2355745, 3028815, 4240341, 7067235, 21201705]

約数ペア:

[(1, 21201705), (3, 7067235), (5, 4240341), (7, 3028815), (9, 2355745), (15, 1413447), (21, 1009605), (35, 605763), (45, 471149), (63, 336535), (105, 201921), (315, 67307)]