20489715

素因数分解:

$3^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{10589}}^1$

素因数の和:10643

約数の個数: 24

約数和(自身を含む): 36344880

約数和(自身を除く): 15855165

約数列:

[1, 3, 5, 9, 15, 43, 45, 129, 215, 387, 645, 1935, 10589, 31767, 52945, 95301, 158835, 455327, 476505, 1365981, 2276635, 4097943, 6829905, 20489715]

約数ペア:

[(1, 20489715), (3, 6829905), (5, 4097943), (9, 2276635), (15, 1365981), (43, 476505), (45, 455327), (129, 158835), (215, 95301), (387, 52945), (645, 31767), (1935, 10589)]