21239235

素因数分解:

$3^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{20521}}^1$

素因数の和:20555

約数の個数: 24

約数和(自身を含む): 38417184

約数和(自身を除く): 17177949

約数列:

[1, 3, 5, 9, 15, 23, 45, 69, 115, 207, 345, 1035, 20521, 61563, 102605, 184689, 307815, 471983, 923445, 1415949, 2359915, 4247847, 7079745, 21239235]

約数ペア:

[(1, 21239235), (3, 7079745), (5, 4247847), (9, 2359915), (15, 1415949), (23, 923445), (45, 471983), (69, 307815), (115, 184689), (207, 102605), (345, 61563), (1035, 20521)]