19809475

素因数分解:

$5^2\times 7^2\times {\mathrm{103}}^1\times {\mathrm{157}}^1$

素因数の和:284

約数の個数: 36

約数和(自身を含む): 29035344

約数和(自身を除く): 9225869

約数列:

[1, 5, 7, 25, 35, 49, 103, 157, 175, 245, 515, 721, 785, 1099, 1225, 2575, 3605, 3925, 5047, 5495, 7693, 16171, 18025, 25235, 27475, 38465, 80855, 113197, 126175, 192325, 404275, 565985, 792379, 2829925, 3961895, 19809475]

約数ペア:

[(1, 19809475), (5, 3961895), (7, 2829925), (25, 792379), (35, 565985), (49, 404275), (103, 192325), (157, 126175), (175, 113197), (245, 80855), (515, 38465), (721, 27475), (785, 25235), (1099, 18025), (1225, 16171), (2575, 7693), (3605, 5495), (3925, 5047)]