21681844

素因数分解:

$2^2\times {\mathrm{109}}^1\times {\mathrm{223}}^2$

素因数の和:559

約数の個数: 18

約数和(自身を含む): 38463810

約数和(自身を除く): 16781966

約数列:

[1, 2, 4, 109, 218, 223, 436, 446, 892, 24307, 48614, 49729, 97228, 99458, 198916, 5420461, 10840922, 21681844]

約数ペア:

[(1, 21681844), (2, 10840922), (4, 5420461), (109, 198916), (218, 99458), (223, 97228), (436, 49729), (446, 48614), (892, 24307)]