21606305

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{3041}}^1$

素因数の和:3089

約数の個数: 24

約数和(自身を含む): 31210920

約数和(自身を除く): 9604615

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 3041, 7105, 15205, 21287, 88189, 106435, 149009, 440945, 617323, 745045, 3086615, 4321261, 21606305]

約数ペア:

[(1, 21606305), (5, 4321261), (7, 3086615), (29, 745045), (35, 617323), (49, 440945), (145, 149009), (203, 106435), (245, 88189), (1015, 21287), (1421, 15205), (3041, 7105)]