21404665

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{193}}^1\times {\mathrm{541}}^1$

素因数の和:780

約数の個数: 16

約数和(自身を含む): 26497296

約数和(自身を除く): 5092631

約数列:

[1, 5, 41, 193, 205, 541, 965, 2705, 7913, 22181, 39565, 104413, 110905, 522065, 4280933, 21404665]

約数ペア:

[(1, 21404665), (5, 4280933), (41, 522065), (193, 110905), (205, 104413), (541, 39565), (965, 22181), (2705, 7913)]