21347291

素因数分解:

$7^4\times {\mathrm{17}}^1\times {\mathrm{523}}^1$

素因数の和:568

約数の個数: 20

約数和(自身を含む): 26419032

約数和(自身を除く): 5071741

約数列:

[1, 7, 17, 49, 119, 343, 523, 833, 2401, 3661, 5831, 8891, 25627, 40817, 62237, 179389, 435659, 1255723, 3049613, 21347291]

約数ペア:

[(1, 21347291), (7, 3049613), (17, 1255723), (49, 435659), (119, 179389), (343, 62237), (523, 40817), (833, 25627), (2401, 8891), (3661, 5831)]