20187920

素因数分解:

$2^4\times 5^1\times {\mathrm{127}}^1\times {\mathrm{1987}}^1$

素因数の和:2127

約数の個数: 40

約数和(自身を含む): 47330304

約数和(自身を除く): 27142384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 127, 254, 508, 635, 1016, 1270, 1987, 2032, 2540, 3974, 5080, 7948, 9935, 10160, 15896, 19870, 31792, 39740, 79480, 158960, 252349, 504698, 1009396, 1261745, 2018792, 2523490, 4037584, 5046980, 10093960, 20187920]

約数ペア:

[(1, 20187920), (2, 10093960), (4, 5046980), (5, 4037584), (8, 2523490), (10, 2018792), (16, 1261745), (20, 1009396), (40, 504698), (80, 252349), (127, 158960), (254, 79480), (508, 39740), (635, 31792), (1016, 19870), (1270, 15896), (1987, 10160), (2032, 9935), (2540, 7948), (3974, 5080)]