20857809

素因数分解:

$3^1\times 7^1\times {\mathrm{103}}^1\times {\mathrm{9643}}^1$

素因数の和:9756

約数の個数: 16

約数和(自身を含む): 32095232

約数和(自身を除く): 11237423

約数列:

[1, 3, 7, 21, 103, 309, 721, 2163, 9643, 28929, 67501, 202503, 993229, 2979687, 6952603, 20857809]

約数ペア:

[(1, 20857809), (3, 6952603), (7, 2979687), (21, 993229), (103, 202503), (309, 67501), (721, 28929), (2163, 9643)]