21309615

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{6863}}^1$

素因数の和:6900

約数の個数: 32

約数和(自身を含む): 39536640

約数和(自身を除く): 18227025

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 115, 135, 207, 345, 621, 1035, 3105, 6863, 20589, 34315, 61767, 102945, 157849, 185301, 308835, 473547, 789245, 926505, 1420641, 2367735, 4261923, 7103205, 21309615]

約数ペア:

[(1, 21309615), (3, 7103205), (5, 4261923), (9, 2367735), (15, 1420641), (23, 926505), (27, 789245), (45, 473547), (69, 308835), (115, 185301), (135, 157849), (207, 102945), (345, 61767), (621, 34315), (1035, 20589), (3105, 6863)]