21571209

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{1999}}^1$

素因数の和:2125

約数の個数: 24

約数和(自身を含む): 34320000

約数和(自身を除く): 12748791

約数列:

[1, 3, 9, 11, 33, 99, 109, 327, 981, 1199, 1999, 3597, 5997, 10791, 17991, 21989, 65967, 197901, 217891, 653673, 1961019, 2396801, 7190403, 21571209]

約数ペア:

[(1, 21571209), (3, 7190403), (9, 2396801), (11, 1961019), (33, 653673), (99, 217891), (109, 197901), (327, 65967), (981, 21989), (1199, 17991), (1999, 10791), (3597, 5997)]