21226751

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{709}}^1$

素因数の和:783

約数の個数: 24

約数和(自身を含む): 27195840

約数和(自身を除く): 5969089

約数列:

[1, 7, 13, 47, 49, 91, 329, 611, 637, 709, 2303, 4277, 4963, 9217, 29939, 33323, 34741, 64519, 233261, 433199, 451633, 1632827, 3032393, 21226751]

約数ペア:

[(1, 21226751), (7, 3032393), (13, 1632827), (47, 451633), (49, 433199), (91, 233261), (329, 64519), (611, 34741), (637, 33323), (709, 29939), (2303, 9217), (4277, 4963)]