20851509

素因数分解:

$3^1\times 7^2\times {\mathrm{83}}^1\times {\mathrm{1709}}^1$

素因数の和:1809

約数の個数: 24

約数和(自身を含む): 32749920

約数和(自身を除く): 11898411

約数列:

[1, 3, 7, 21, 49, 83, 147, 249, 581, 1709, 1743, 4067, 5127, 11963, 12201, 35889, 83741, 141847, 251223, 425541, 992929, 2978787, 6950503, 20851509]

約数ペア:

[(1, 20851509), (3, 6950503), (7, 2978787), (21, 992929), (49, 425541), (83, 251223), (147, 141847), (249, 83741), (581, 35889), (1709, 12201), (1743, 11963), (4067, 5127)]