21539985

素因数分解:

$3^1\times 5^1\times {\mathrm{409}}^1\times {\mathrm{3511}}^1$

素因数の和:3928

約数の個数: 16

約数和(自身を含む): 34558080

約数和(自身を除く): 13018095

約数列:

[1, 3, 5, 15, 409, 1227, 2045, 3511, 6135, 10533, 17555, 52665, 1435999, 4307997, 7179995, 21539985]

約数ペア:

[(1, 21539985), (3, 7179995), (5, 4307997), (15, 1435999), (409, 52665), (1227, 17555), (2045, 10533), (3511, 6135)]