20218779

素因数分解:

$3^2\times 7^1\times {\mathrm{487}}^1\times {\mathrm{659}}^1$

素因数の和:1159

約数の個数: 24

約数和(自身を含む): 33496320

約数和(自身を除く): 13277541

約数列:

[1, 3, 7, 9, 21, 63, 487, 659, 1461, 1977, 3409, 4383, 4613, 5931, 10227, 13839, 30681, 41517, 320933, 962799, 2246531, 2888397, 6739593, 20218779]

約数ペア:

[(1, 20218779), (3, 6739593), (7, 2888397), (9, 2246531), (21, 962799), (63, 320933), (487, 41517), (659, 30681), (1461, 13839), (1977, 10227), (3409, 5931), (4383, 4613)]