19999395

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2011}}^1$

素因数の和:2052

約数の個数: 48

約数和(自身を含む): 39547872

約数和(自身を除く): 19548477

約数列:

[1, 3, 5, 9, 13, 15, 17, 39, 45, 51, 65, 85, 117, 153, 195, 221, 255, 585, 663, 765, 1105, 1989, 2011, 3315, 6033, 9945, 10055, 18099, 26143, 30165, 34187, 78429, 90495, 102561, 130715, 170935, 235287, 307683, 392145, 444431, 512805, 1176435, 1333293, 1538415, 2222155, 3999879, 6666465, 19999395]

約数ペア:

[(1, 19999395), (3, 6666465), (5, 3999879), (9, 2222155), (13, 1538415), (15, 1333293), (17, 1176435), (39, 512805), (45, 444431), (51, 392145), (65, 307683), (85, 235287), (117, 170935), (153, 130715), (195, 102561), (221, 90495), (255, 78429), (585, 34187), (663, 30165), (765, 26143), (1105, 18099), (1989, 10055), (2011, 9945), (3315, 6033)]