20631261

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{20903}}^1$

素因数の和:20960

約数の個数: 16

約数和(自身を含む): 32108544

約数和(自身を除く): 11477283

約数列:

[1, 3, 7, 21, 47, 141, 329, 987, 20903, 62709, 146321, 438963, 982441, 2947323, 6877087, 20631261]

約数ペア:

[(1, 20631261), (3, 6877087), (7, 2947323), (21, 982441), (47, 438963), (141, 146321), (329, 62709), (987, 20903)]