21720564

素因数分解:

$2^2\times 3^2\times {\mathrm{603349}}^1$

素因数の和:603359

約数の個数: 18

約数和(自身を含む): 54904850

約数和(自身を除く): 33184286

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 603349, 1206698, 1810047, 2413396, 3620094, 5430141, 7240188, 10860282, 21720564]

約数ペア:

[(1, 21720564), (2, 10860282), (3, 7240188), (4, 5430141), (6, 3620094), (9, 2413396), (12, 1810047), (18, 1206698), (36, 603349)]