21257912

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{4349}}^1$

素因数の和:4415

約数の個数: 32

約数和(自身を含む): 43848000

約数和(自身を除く): 22590088

約数列:

[1, 2, 4, 8, 13, 26, 47, 52, 94, 104, 188, 376, 611, 1222, 2444, 4349, 4888, 8698, 17396, 34792, 56537, 113074, 204403, 226148, 408806, 452296, 817612, 1635224, 2657239, 5314478, 10628956, 21257912]

約数ペア:

[(1, 21257912), (2, 10628956), (4, 5314478), (8, 2657239), (13, 1635224), (26, 817612), (47, 452296), (52, 408806), (94, 226148), (104, 204403), (188, 113074), (376, 56537), (611, 34792), (1222, 17396), (2444, 8698), (4349, 4888)]