21262005

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20543}}^1$

素因数の和:20577

約数の個数: 24

約数和(自身を含む): 38458368

約数和(自身を除く): 17196363

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20543, 61629, 102715, 184887, 308145, 472489, 924435, 1417467, 2362445, 4252401, 7087335, 21262005]

約数ペア:

[(1, 21262005), (3, 7087335), (5, 4252401), (9, 2362445), (15, 1417467), (23, 924435), (45, 472489), (69, 308145), (115, 184887), (207, 102715), (345, 61629), (1035, 20543)]