81221060

素因数分解:

$2^2\times 5^1\times {\mathrm{223}}^1\times {\mathrm{18211}}^1$

素因数の和:18443

約数の個数: 24

約数和(自身を含む): 171338496

約数和(自身を除く): 90117436

約数列:

[1, 2, 4, 5, 10, 20, 223, 446, 892, 1115, 2230, 4460, 18211, 36422, 72844, 91055, 182110, 364220, 4061053, 8122106, 16244212, 20305265, 40610530, 81221060]

約数ペア:

[(1, 81221060), (2, 40610530), (4, 20305265), (5, 16244212), (10, 8122106), (20, 4061053), (223, 364220), (446, 182110), (892, 91055), (1115, 72844), (2230, 36422), (4460, 18211)]