19987479

素因数分解:

$3^5\times {\mathrm{83}}^1\times {\mathrm{991}}^1$

素因数の和:1089

約数の個数: 24

約数和(自身を含む): 30331392

約数和(自身を除く): 10343913

約数列:

[1, 3, 9, 27, 81, 83, 243, 249, 747, 991, 2241, 2973, 6723, 8919, 20169, 26757, 80271, 82253, 240813, 246759, 740277, 2220831, 6662493, 19987479]

約数ペア:

[(1, 19987479), (3, 6662493), (9, 2220831), (27, 740277), (81, 246759), (83, 240813), (243, 82253), (249, 80271), (747, 26757), (991, 20169), (2241, 8919), (2973, 6723)]