28719145

素因数分解:

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

素因数の和:230

約数の個数: 48

約数和(自身を含む): 44126208

約数和(自身を除く): 15407063

約数列:

[1, 5, 7, 13, 35, 49, 65, 71, 91, 127, 245, 355, 455, 497, 635, 637, 889, 923, 1651, 2485, 3185, 3479, 4445, 4615, 6223, 6461, 8255, 9017, 11557, 17395, 31115, 32305, 45085, 45227, 57785, 63119, 80899, 117221, 226135, 315595, 404495, 441833, 586105, 820547, 2209165, 4102735, 5743829, 28719145]

約数ペア:

[(1, 28719145), (5, 5743829), (7, 4102735), (13, 2209165), (35, 820547), (49, 586105), (65, 441833), (71, 404495), (91, 315595), (127, 226135), (245, 117221), (355, 80899), (455, 63119), (497, 57785), (635, 45227), (637, 45085), (889, 32305), (923, 31115), (1651, 17395), (2485, 11557), (3185, 9017), (3479, 8255), (4445, 6461), (4615, 6223)]