21609245

素因数分解:

$5^1\times 7^2\times {\mathrm{193}}^1\times {\mathrm{457}}^1$

素因数の和:669

約数の個数: 24

約数和(自身を含む): 30387384

約数和(自身を除く): 8778139

約数列:

[1, 5, 7, 35, 49, 193, 245, 457, 965, 1351, 2285, 3199, 6755, 9457, 15995, 22393, 47285, 88201, 111965, 441005, 617407, 3087035, 4321849, 21609245]

約数ペア:

[(1, 21609245), (5, 4321849), (7, 3087035), (35, 617407), (49, 441005), (193, 111965), (245, 88201), (457, 47285), (965, 22393), (1351, 15995), (2285, 9457), (3199, 6755)]