20384847

素因数分解:

$3^2\times 7^1\times {\mathrm{491}}^1\times {\mathrm{659}}^1$

素因数の和:1163

約数の個数: 24

約数和(自身を含む): 33770880

約数和(自身を除く): 13386033

約数列:

[1, 3, 7, 9, 21, 63, 491, 659, 1473, 1977, 3437, 4419, 4613, 5931, 10311, 13839, 30933, 41517, 323569, 970707, 2264983, 2912121, 6794949, 20384847]

約数ペア:

[(1, 20384847), (3, 6794949), (7, 2912121), (9, 2264983), (21, 970707), (63, 323569), (491, 41517), (659, 30933), (1473, 13839), (1977, 10311), (3437, 5931), (4419, 4613)]