20908475

素因数分解:

$5^2\times 7^1\times {\mathrm{157}}^1\times {\mathrm{761}}^1$

素因数の和:935

約数の個数: 24

約数和(自身を含む): 29858208

約数和(自身を除く): 8949733

約数列:

[1, 5, 7, 25, 35, 157, 175, 761, 785, 1099, 3805, 3925, 5327, 5495, 19025, 26635, 27475, 119477, 133175, 597385, 836339, 2986925, 4181695, 20908475]

約数ペア:

[(1, 20908475), (5, 4181695), (7, 2986925), (25, 836339), (35, 597385), (157, 133175), (175, 119477), (761, 27475), (785, 26635), (1099, 19025), (3805, 5495), (3925, 5327)]