28947820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131581}}^1$

素因数の和:131601

約数の個数: 24

約数和(自身を含む): 66317328

約数和(自身を除く): 37369508

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 131581, 263162, 526324, 657905, 1315810, 1447391, 2631620, 2894782, 5789564, 7236955, 14473910, 28947820]

約数ペア:

[(1, 28947820), (2, 14473910), (4, 7236955), (5, 5789564), (10, 2894782), (11, 2631620), (20, 1447391), (22, 1315810), (44, 657905), (55, 526324), (110, 263162), (220, 131581)]