21445977

素因数分解:

$3^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{3943}}^1$

素因数の和:3997

約数の個数: 24

約数和(自身を含む): 34170816

約数和(自身を除く): 12724839

約数列:

[1, 3, 7, 21, 37, 49, 111, 147, 259, 777, 1813, 3943, 5439, 11829, 27601, 82803, 145891, 193207, 437673, 579621, 1021237, 3063711, 7148659, 21445977]

約数ペア:

[(1, 21445977), (3, 7148659), (7, 3063711), (21, 1021237), (37, 579621), (49, 437673), (111, 193207), (147, 145891), (259, 82803), (777, 27601), (1813, 11829), (3943, 5439)]