20199985

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{2447}}^1$

素因数の和:2592

約数の個数: 16

約数和(自身を含む): 26320896

約数和(自身を除く): 6120911

約数列:

[1, 5, 13, 65, 127, 635, 1651, 2447, 8255, 12235, 31811, 159055, 310769, 1553845, 4039997, 20199985]

約数ペア:

[(1, 20199985), (5, 4039997), (13, 1553845), (65, 310769), (127, 159055), (635, 31811), (1651, 12235), (2447, 8255)]