21309365

素因数分解:

$5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{7907}}^1$

素因数の和:7937

約数の個数: 24

約数和(自身を含む): 32454432

約数和(自身を除く): 11145067

約数列:

[1, 5, 7, 11, 35, 49, 55, 77, 245, 385, 539, 2695, 7907, 39535, 55349, 86977, 276745, 387443, 434885, 608839, 1937215, 3044195, 4261873, 21309365]

約数ペア:

[(1, 21309365), (5, 4261873), (7, 3044195), (11, 1937215), (35, 608839), (49, 434885), (55, 387443), (77, 276745), (245, 86977), (385, 55349), (539, 39535), (2695, 7907)]