20686345

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{113}}^1$

素因数の和:225

約数の個数: 32

約数和(自身を含む): 27578880

約数和(自身を除く): 6892535

約数列:

[1, 5, 19, 41, 47, 95, 113, 205, 235, 565, 779, 893, 1927, 2147, 3895, 4465, 4633, 5311, 9635, 10735, 23165, 26555, 36613, 88027, 100909, 183065, 217751, 440135, 504545, 1088755, 4137269, 20686345]

約数ペア:

[(1, 20686345), (5, 4137269), (19, 1088755), (41, 504545), (47, 440135), (95, 217751), (113, 183065), (205, 100909), (235, 88027), (565, 36613), (779, 26555), (893, 23165), (1927, 10735), (2147, 9635), (3895, 5311), (4465, 4633)]