21391244

素因数分解:

$2^2\times 7^2\times {\mathrm{109139}}^1$

素因数の和:109157

約数の個数: 18

約数和(自身を含む): 43546860

約数和(自身を除く): 22155616

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 109139, 218278, 436556, 763973, 1527946, 3055892, 5347811, 10695622, 21391244]

約数ペア:

[(1, 21391244), (2, 10695622), (4, 5347811), (7, 3055892), (14, 1527946), (28, 763973), (49, 436556), (98, 218278), (196, 109139)]