21805725

素因数分解:

$3^1\times 5^2\times {\mathrm{23}}^1\times {\mathrm{12641}}^1$

素因数の和:12677

約数の個数: 24

約数和(自身を含む): 37622592

約数和(自身を除く): 15816867

約数列:

[1, 3, 5, 15, 23, 25, 69, 75, 115, 345, 575, 1725, 12641, 37923, 63205, 189615, 290743, 316025, 872229, 948075, 1453715, 4361145, 7268575, 21805725]

約数ペア:

[(1, 21805725), (3, 7268575), (5, 4361145), (15, 1453715), (23, 948075), (25, 872229), (69, 316025), (75, 290743), (115, 189615), (345, 63205), (575, 37923), (1725, 12641)]