21079540

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{15731}}^1$

素因数の和:15807

約数の個数: 24

約数和(自身を含む): 44930592

約数和(自身を除く): 23851052

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 15731, 31462, 62924, 78655, 157310, 314620, 1053977, 2107954, 4215908, 5269885, 10539770, 21079540]

約数ペア:

[(1, 21079540), (2, 10539770), (4, 5269885), (5, 4215908), (10, 2107954), (20, 1053977), (67, 314620), (134, 157310), (268, 78655), (335, 62924), (670, 31462), (1340, 15731)]