20554821

素因数分解:

$3^2\times 7^1\times {\mathrm{431}}^1\times {\mathrm{757}}^1$

素因数の和:1201

約数の個数: 24

約数和(自身を含む): 34055424

約数和(自身を除く): 13500603

約数列:

[1, 3, 7, 9, 21, 63, 431, 757, 1293, 2271, 3017, 3879, 5299, 6813, 9051, 15897, 27153, 47691, 326267, 978801, 2283869, 2936403, 6851607, 20554821]

約数ペア:

[(1, 20554821), (3, 6851607), (7, 2936403), (9, 2283869), (21, 978801), (63, 326267), (431, 47691), (757, 27153), (1293, 15897), (2271, 9051), (3017, 6813), (3879, 5299)]