21157808

素因数分解:

$2^4\times 7^2\times {\mathrm{26987}}^1$

素因数の和:27009

約数の個数: 30

約数和(自身を含む): 47687796

約数和(自身を除く): 26529988

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, 784, 26987, 53974, 107948, 188909, 215896, 377818, 431792, 755636, 1322363, 1511272, 2644726, 3022544, 5289452, 10578904, 21157808]

約数ペア:

[(1, 21157808), (2, 10578904), (4, 5289452), (7, 3022544), (8, 2644726), (14, 1511272), (16, 1322363), (28, 755636), (49, 431792), (56, 377818), (98, 215896), (112, 188909), (196, 107948), (392, 53974), (784, 26987)]