21212870

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{67}}^1\times {\mathrm{4523}}^1$

素因数の和:4604

約数の個数: 32

約数和(自身を含む): 44299008

約数和(自身を除く): 23086138

約数列:

[1, 2, 5, 7, 10, 14, 35, 67, 70, 134, 335, 469, 670, 938, 2345, 4523, 4690, 9046, 22615, 31661, 45230, 63322, 158305, 303041, 316610, 606082, 1515205, 2121287, 3030410, 4242574, 10606435, 21212870]

約数ペア:

[(1, 21212870), (2, 10606435), (5, 4242574), (7, 3030410), (10, 2121287), (14, 1515205), (35, 606082), (67, 316610), (70, 303041), (134, 158305), (335, 63322), (469, 45230), (670, 31661), (938, 22615), (2345, 9046), (4523, 4690)]