20105505

素因数分解:

$3^2\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{769}}^1$

素因数の和:870

約数の個数: 48

約数和(自身を含む): 40360320

約数和(自身を除く): 20254815

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 63, 83, 105, 249, 315, 415, 581, 747, 769, 1245, 1743, 2307, 2905, 3735, 3845, 5229, 5383, 6921, 8715, 11535, 16149, 26145, 26915, 34605, 48447, 63827, 80745, 191481, 242235, 319135, 446789, 574443, 957405, 1340367, 2233945, 2872215, 4021101, 6701835, 20105505]

約数ペア:

[(1, 20105505), (3, 6701835), (5, 4021101), (7, 2872215), (9, 2233945), (15, 1340367), (21, 957405), (35, 574443), (45, 446789), (63, 319135), (83, 242235), (105, 191481), (249, 80745), (315, 63827), (415, 48447), (581, 34605), (747, 26915), (769, 26145), (1245, 16149), (1743, 11535), (2307, 8715), (2905, 6921), (3735, 5383), (3845, 5229)]