21851557

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{2203}}^1$

素因数の和:2332

約数の個数: 16

約数和(自身を含む): 27153280

約数和(自身を除く): 5301723

約数列:

[1, 7, 13, 91, 109, 763, 1417, 2203, 9919, 15421, 28639, 200473, 240127, 1680889, 3121651, 21851557]

約数ペア:

[(1, 21851557), (7, 3121651), (13, 1680889), (91, 240127), (109, 200473), (763, 28639), (1417, 15421), (2203, 9919)]