21405601

素因数分解:

$7^3\times {\mathrm{17}}^1\times {\mathrm{3671}}^1$

素因数の和:3709

約数の個数: 16

約数和(自身を含む): 26438400

約数和(自身を除く): 5032799

約数列:

[1, 7, 17, 49, 119, 343, 833, 3671, 5831, 25697, 62407, 179879, 436849, 1259153, 3057943, 21405601]

約数ペア:

[(1, 21405601), (7, 3057943), (17, 1259153), (49, 436849), (119, 179879), (343, 62407), (833, 25697), (3671, 5831)]