21891233

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{2207}}^1$

素因数の和:2336

約数の個数: 16

約数和(自身を含む): 27202560

約数和(自身を除く): 5311327

約数列:

[1, 7, 13, 91, 109, 763, 1417, 2207, 9919, 15449, 28691, 200837, 240563, 1683941, 3127319, 21891233]

約数ペア:

[(1, 21891233), (7, 3127319), (13, 1683941), (91, 240563), (109, 200837), (763, 28691), (1417, 15449), (2207, 9919)]