20909625

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{137}}^1$

素因数の和:203

約数の個数: 64

約数和(自身を含む): 39267072

約数和(自身を除く): 18357447

約数列:

[1, 3, 5, 11, 15, 25, 33, 37, 55, 75, 111, 125, 137, 165, 185, 275, 375, 407, 411, 555, 685, 825, 925, 1221, 1375, 1507, 2035, 2055, 2775, 3425, 4125, 4521, 4625, 5069, 6105, 7535, 10175, 10275, 13875, 15207, 17125, 22605, 25345, 30525, 37675, 50875, 51375, 55759, 76035, 113025, 126725, 152625, 167277, 188375, 278795, 380175, 565125, 633625, 836385, 1393975, 1900875, 4181925, 6969875, 20909625]

約数ペア:

[(1, 20909625), (3, 6969875), (5, 4181925), (11, 1900875), (15, 1393975), (25, 836385), (33, 633625), (37, 565125), (55, 380175), (75, 278795), (111, 188375), (125, 167277), (137, 152625), (165, 126725), (185, 113025), (275, 76035), (375, 55759), (407, 51375), (411, 50875), (555, 37675), (685, 30525), (825, 25345), (925, 22605), (1221, 17125), (1375, 15207), (1507, 13875), (2035, 10275), (2055, 10175), (2775, 7535), (3425, 6105), (4125, 5069), (4521, 4625)]