20987187

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{4937}}^1$

素因数の和:5062

約数の個数: 16

約数和(自身を含む): 30418080

約数和(自身を除く): 9430893

約数列:

[1, 3, 13, 39, 109, 327, 1417, 4251, 4937, 14811, 64181, 192543, 538133, 1614399, 6995729, 20987187]

約数ペア:

[(1, 20987187), (3, 6995729), (13, 1614399), (39, 538133), (109, 192543), (327, 64181), (1417, 14811), (4251, 4937)]