21570255

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{68477}}^1$

素因数の和:68495

約数の個数: 24

約数和(自身を含む): 42730272

約数和(自身を除く): 21160017

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 105, 315, 68477, 205431, 342385, 479339, 616293, 1027155, 1438017, 2396695, 3081465, 4314051, 7190085, 21570255]

約数ペア:

[(1, 21570255), (3, 7190085), (5, 4314051), (7, 3081465), (9, 2396695), (15, 1438017), (21, 1027155), (35, 616293), (45, 479339), (63, 342385), (105, 205431), (315, 68477)]