20817321

素因数分解:

$3^1\times 7^1\times {\mathrm{631}}^1\times {\mathrm{1571}}^1$

素因数の和:2212

約数の個数: 16

約数和(自身を含む): 31792128

約数和(自身を除く): 10974807

約数列:

[1, 3, 7, 21, 631, 1571, 1893, 4417, 4713, 10997, 13251, 32991, 991301, 2973903, 6939107, 20817321]

約数ペア:

[(1, 20817321), (3, 6939107), (7, 2973903), (21, 991301), (631, 32991), (1571, 13251), (1893, 10997), (4417, 4713)]