78171723

素因数分解:

$3^4\times 7^1\times {\mathrm{137869}}^1$

素因数の和:137888

約数の個数: 20

約数和(自身を含む): 133458160

約数和(自身を除く): 55286437

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 137869, 413607, 965083, 1240821, 2895249, 3722463, 8685747, 11167389, 26057241, 78171723]

約数ペア:

[(1, 78171723), (3, 26057241), (7, 11167389), (9, 8685747), (21, 3722463), (27, 2895249), (63, 1240821), (81, 965083), (189, 413607), (567, 137869)]