20415717

素因数分解:

$3^2\times 7^1\times {\mathrm{541}}^1\times {\mathrm{599}}^1$

素因数の和:1153

約数の個数: 24

約数和(自身を含む): 33820800

約数和(自身を除く): 13405083

約数列:

[1, 3, 7, 9, 21, 63, 541, 599, 1623, 1797, 3787, 4193, 4869, 5391, 11361, 12579, 34083, 37737, 324059, 972177, 2268413, 2916531, 6805239, 20415717]

約数ペア:

[(1, 20415717), (3, 6805239), (7, 2916531), (9, 2268413), (21, 972177), (63, 324059), (541, 37737), (599, 34083), (1623, 12579), (1797, 11361), (3787, 5391), (4193, 4869)]