21058299

素因数分解:

$3^4\times {\mathrm{499}}^1\times {\mathrm{521}}^1$

素因数の和:1032

約数の個数: 20

約数和(自身を含む): 31581000

約数和(自身を除く): 10522701

約数列:

[1, 3, 9, 27, 81, 499, 521, 1497, 1563, 4491, 4689, 13473, 14067, 40419, 42201, 259979, 779937, 2339811, 7019433, 21058299]

約数ペア:

[(1, 21058299), (3, 7019433), (9, 2339811), (27, 779937), (81, 259979), (499, 42201), (521, 40419), (1497, 14067), (1563, 13473), (4491, 4689)]