21979690

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{53609}}^1$

素因数の和:53657

約数の個数: 16

約数和(自身を含む): 40529160

約数和(自身を除く): 18549470

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 53609, 107218, 268045, 536090, 2197969, 4395938, 10989845, 21979690]

約数ペア:

[(1, 21979690), (2, 10989845), (5, 4395938), (10, 2197969), (41, 536090), (82, 268045), (205, 107218), (410, 53609)]