21490847

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{727}}^1$

素因数の和:878

約数の個数: 16

約数和(自身を含む): 25439232

約数和(自身を除く): 3948385

約数列:

[1, 7, 41, 103, 287, 721, 727, 4223, 5089, 29561, 29807, 74881, 208649, 524167, 3070121, 21490847]

約数ペア:

[(1, 21490847), (7, 3070121), (41, 524167), (103, 208649), (287, 74881), (721, 29807), (727, 29561), (4223, 5089)]