18118289

素因数分解:

$7^3\times {\mathrm{101}}^1\times {\mathrm{523}}^1$

素因数の和:645

約数の個数: 16

約数和(自身を含む): 21379200

約数和(自身を除く): 3260911

約数列:

[1, 7, 49, 101, 343, 523, 707, 3661, 4949, 25627, 34643, 52823, 179389, 369761, 2588327, 18118289]

約数ペア:

[(1, 18118289), (7, 2588327), (49, 369761), (101, 179389), (343, 52823), (523, 34643), (707, 25627), (3661, 4949)]