20668445

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{2909}}^1$

素因数の和:2957

約数の個数: 24

約数和(自身を含む): 29856600

約数和(自身を除く): 9188155

約数列:

[1, 5, 7, 29, 35, 49, 145, 203, 245, 1015, 1421, 2909, 7105, 14545, 20363, 84361, 101815, 142541, 421805, 590527, 712705, 2952635, 4133689, 20668445]

約数ペア:

[(1, 20668445), (5, 4133689), (7, 2952635), (29, 712705), (35, 590527), (49, 421805), (145, 142541), (203, 101815), (245, 84361), (1015, 20363), (1421, 14545), (2909, 7105)]