20990809

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{53}}^1\times {\mathrm{1951}}^1$

素因数の和:2040

約数の個数: 16

約数和(自身を含む): 25297920

約数和(自身を除く): 4307111

約数列:

[1, 7, 29, 53, 203, 371, 1537, 1951, 10759, 13657, 56579, 103403, 396053, 723821, 2998687, 20990809]

約数ペア:

[(1, 20990809), (7, 2998687), (29, 723821), (53, 396053), (203, 103403), (371, 56579), (1537, 13657), (1951, 10759)]