81213938

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{28657}}^1$

素因数の和:28781

約数の個数: 16

約数和(自身を含む): 132399960

約数和(自身を除く): 51186022

約数列:

[1, 2, 13, 26, 109, 218, 1417, 2834, 28657, 57314, 372541, 745082, 3123613, 6247226, 40606969, 81213938]

約数ペア:

[(1, 81213938), (2, 40606969), (13, 6247226), (26, 3123613), (109, 745082), (218, 372541), (1417, 57314), (2834, 28657)]