20647347

素因数分解:

$3^1\times 7^1\times {\mathrm{223}}^1\times {\mathrm{4409}}^1$

素因数の和:4642

約数の個数: 16

約数和(自身を含む): 31610880

約数和(自身を除く): 10963533

約数列:

[1, 3, 7, 21, 223, 669, 1561, 4409, 4683, 13227, 30863, 92589, 983207, 2949621, 6882449, 20647347]

約数ペア:

[(1, 20647347), (3, 6882449), (7, 2949621), (21, 983207), (223, 92589), (669, 30863), (1561, 13227), (4409, 4683)]