20513675

素因数分解:

$5^2\times 7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{127}}^1$

素因数の和:228

約数の個数: 48

約数和(自身を含む): 31997952

約数和(自身を除く): 11484277

約数列:

[1, 5, 7, 13, 25, 35, 65, 71, 91, 127, 175, 325, 355, 455, 497, 635, 889, 923, 1651, 1775, 2275, 2485, 3175, 4445, 4615, 6461, 8255, 9017, 11557, 12425, 22225, 23075, 32305, 41275, 45085, 57785, 63119, 117221, 161525, 225425, 288925, 315595, 586105, 820547, 1577975, 2930525, 4102735, 20513675]

約数ペア:

[(1, 20513675), (5, 4102735), (7, 2930525), (13, 1577975), (25, 820547), (35, 586105), (65, 315595), (71, 288925), (91, 225425), (127, 161525), (175, 117221), (325, 63119), (355, 57785), (455, 45085), (497, 41275), (635, 32305), (889, 23075), (923, 22225), (1651, 12425), (1775, 11557), (2275, 9017), (2485, 8255), (3175, 6461), (4445, 4615)]