21241786

素因数分解:

$2^1\times {\mathrm{61}}^1\times {\mathrm{157}}^1\times {\mathrm{1109}}^1$

素因数の和:1329

約数の個数: 16

約数和(自身を含む): 32620680

約数和(自身を除く): 11378894

約数列:

[1, 2, 61, 122, 157, 314, 1109, 2218, 9577, 19154, 67649, 135298, 174113, 348226, 10620893, 21241786]

約数ペア:

[(1, 21241786), (2, 10620893), (61, 348226), (122, 174113), (157, 135298), (314, 67649), (1109, 19154), (2218, 9577)]