20527521

素因数分解:

$3^1\times 7^3\times {\mathrm{19949}}^1$

素因数の和:19973

約数の個数: 16

約数和(自身を含む): 31920000

約数和(自身を除く): 11392479

約数列:

[1, 3, 7, 21, 49, 147, 343, 1029, 19949, 59847, 139643, 418929, 977501, 2932503, 6842507, 20527521]

約数ペア:

[(1, 20527521), (3, 6842507), (7, 2932503), (21, 977501), (49, 418929), (147, 139643), (343, 59847), (1029, 19949)]