20989397

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{3967}}^1$

素因数の和:4028

約数の個数: 16

約数和(自身を含む): 25331712

約数和(自身を除く): 4342315

約数列:

[1, 11, 13, 37, 143, 407, 481, 3967, 5291, 43637, 51571, 146779, 567281, 1614569, 1908127, 20989397]

約数ペア:

[(1, 20989397), (11, 1908127), (13, 1614569), (37, 567281), (143, 146779), (407, 51571), (481, 43637), (3967, 5291)]