20688820

素因数分解:

$2^2\times 5^1\times {\mathrm{179}}^1\times {\mathrm{5779}}^1$

素因数の和:5967

約数の個数: 24

約数和(自身を含む): 43696800

約数和(自身を除く): 23007980

約数列:

[1, 2, 4, 5, 10, 20, 179, 358, 716, 895, 1790, 3580, 5779, 11558, 23116, 28895, 57790, 115580, 1034441, 2068882, 4137764, 5172205, 10344410, 20688820]

約数ペア:

[(1, 20688820), (2, 10344410), (4, 5172205), (5, 4137764), (10, 2068882), (20, 1034441), (179, 115580), (358, 57790), (716, 28895), (895, 23116), (1790, 11558), (3580, 5779)]