21979997

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{271}}^1\times {\mathrm{367}}^1$

素因数の和:668

約数の個数: 16

約数和(自身を含む): 25224192

約数和(自身を除く): 3244195

約数列:

[1, 13, 17, 221, 271, 367, 3523, 4607, 4771, 6239, 59891, 81107, 99457, 1292941, 1690769, 21979997]

約数ペア:

[(1, 21979997), (13, 1690769), (17, 1292941), (221, 99457), (271, 81107), (367, 59891), (3523, 6239), (4607, 4771)]