21241305

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6841}}^1$

素因数の和:6878

約数の個数: 32

約数和(自身を含む): 39409920

約数和(自身を除く): 18168615

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6841, 20523, 34205, 61569, 102615, 157343, 184707, 307845, 472029, 786715, 923535, 1416087, 2360145, 4248261, 7080435, 21241305]

約数ペア:

[(1, 21241305), (3, 7080435), (5, 4248261), (9, 2360145), (15, 1416087), (23, 923535), (27, 786715), (45, 472029), (69, 307845), (115, 184707), (135, 157343), (207, 102615), (345, 61569), (621, 34205), (1035, 20523), (3105, 6841)]