21978561

素因数分解:

$3^1\times {\mathrm{11}}^2\times {\mathrm{191}}^1\times {\mathrm{317}}^1$

素因数の和:533

約数の個数: 24

約数和(自身を含む): 32481792

約数和(自身を除く): 10503231

約数列:

[1, 3, 11, 33, 121, 191, 317, 363, 573, 951, 2101, 3487, 6303, 10461, 23111, 38357, 60547, 69333, 115071, 181641, 666017, 1998051, 7326187, 21978561]

約数ペア:

[(1, 21978561), (3, 7326187), (11, 1998051), (33, 666017), (121, 181641), (191, 115071), (317, 69333), (363, 60547), (573, 38357), (951, 23111), (2101, 10461), (3487, 6303)]