20121779

素因数分解:

${\mathrm{19}}^2\times {\mathrm{139}}^1\times {\mathrm{401}}^1$

素因数の和:578

約数の個数: 12

約数和(自身を含む): 21442680

約数和(自身を除く): 1320901

約数列:

[1, 19, 139, 361, 401, 2641, 7619, 50179, 55739, 144761, 1059041, 20121779]

約数ペア:

[(1, 20121779), (19, 1059041), (139, 144761), (361, 55739), (401, 50179), (2641, 7619)]