20904578

素因数分解:

$2^1\times {\mathrm{53}}^2\times {\mathrm{61}}^2$

素因数の和:230

約数の個数: 18

約数和(自身を含む): 32492187

約数和(自身を除く): 11587609

約数列:

[1, 2, 53, 61, 106, 122, 2809, 3233, 3721, 5618, 6466, 7442, 171349, 197213, 342698, 394426, 10452289, 20904578]

約数ペア:

[(1, 20904578), (2, 10452289), (53, 394426), (61, 342698), (106, 197213), (122, 171349), (2809, 7442), (3233, 6466), (3721, 5618)]