20547945

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{137}}^1$

素因数の和:263

約数の個数: 64

約数和(自身を含む): 40538880

約数和(自身を除く): 19990935

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 45, 55, 99, 101, 135, 137, 165, 297, 303, 411, 495, 505, 685, 909, 1111, 1233, 1485, 1507, 1515, 2055, 2727, 3333, 3699, 4521, 4545, 5555, 6165, 7535, 9999, 13563, 13635, 13837, 16665, 18495, 22605, 29997, 40689, 41511, 49995, 67815, 69185, 124533, 149985, 152207, 203445, 207555, 373599, 456621, 622665, 761035, 1369863, 1867995, 2283105, 4109589, 6849315, 20547945]

約数ペア:

[(1, 20547945), (3, 6849315), (5, 4109589), (9, 2283105), (11, 1867995), (15, 1369863), (27, 761035), (33, 622665), (45, 456621), (55, 373599), (99, 207555), (101, 203445), (135, 152207), (137, 149985), (165, 124533), (297, 69185), (303, 67815), (411, 49995), (495, 41511), (505, 40689), (685, 29997), (909, 22605), (1111, 18495), (1233, 16665), (1485, 13837), (1507, 13635), (1515, 13563), (2055, 9999), (2727, 7535), (3333, 6165), (3699, 5555), (4521, 4545)]