20320391

素因数分解:

$7^1\times {\mathrm{13}}^2\times {\mathrm{89}}^1\times {\mathrm{193}}^1$

素因数の和:315

約数の個数: 24

約数和(自身を含む): 25561440

約数和(自身を除く): 5241049

約数列:

[1, 7, 13, 89, 91, 169, 193, 623, 1157, 1183, 1351, 2509, 8099, 15041, 17177, 17563, 32617, 105287, 120239, 223301, 228319, 1563107, 2902913, 20320391]

約数ペア:

[(1, 20320391), (7, 2902913), (13, 1563107), (89, 228319), (91, 223301), (169, 120239), (193, 105287), (623, 32617), (1157, 17563), (1183, 17177), (1351, 15041), (2509, 8099)]