21121245

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20407}}^1$

素因数の和:20441

約数の個数: 24

約数和(自身を含む): 38203776

約数和(自身を除く): 17082531

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20407, 61221, 102035, 183663, 306105, 469361, 918315, 1408083, 2346805, 4224249, 7040415, 21121245]

約数ペア:

[(1, 21121245), (3, 7040415), (5, 4224249), (9, 2346805), (15, 1408083), (23, 918315), (45, 469361), (69, 306105), (115, 183663), (207, 102035), (345, 61221), (1035, 20407)]