21425620

素因数分解:

$2^2\times 5^1\times {\mathrm{83}}^1\times {\mathrm{12907}}^1$

素因数の和:12999

約数の個数: 24

約数和(自身を含む): 45539424

約数和(自身を除く): 24113804

約数列:

[1, 2, 4, 5, 10, 20, 83, 166, 332, 415, 830, 1660, 12907, 25814, 51628, 64535, 129070, 258140, 1071281, 2142562, 4285124, 5356405, 10712810, 21425620]

約数ペア:

[(1, 21425620), (2, 10712810), (4, 5356405), (5, 4285124), (10, 2142562), (20, 1071281), (83, 258140), (166, 129070), (332, 64535), (415, 51628), (830, 25814), (1660, 12907)]