21478875

素因数分解:

$3^1\times 5^3\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1$

素因数の和:197

約数の個数: 64

約数和(自身を含む): 40255488

約数和(自身を除く): 18776613

約数列:

[1, 3, 5, 11, 15, 25, 33, 41, 55, 75, 123, 125, 127, 165, 205, 275, 375, 381, 451, 615, 635, 825, 1025, 1353, 1375, 1397, 1905, 2255, 3075, 3175, 4125, 4191, 5125, 5207, 6765, 6985, 9525, 11275, 15375, 15621, 15875, 20955, 26035, 33825, 34925, 47625, 56375, 57277, 78105, 104775, 130175, 169125, 171831, 174625, 286385, 390525, 523875, 650875, 859155, 1431925, 1952625, 4295775, 7159625, 21478875]

約数ペア:

[(1, 21478875), (3, 7159625), (5, 4295775), (11, 1952625), (15, 1431925), (25, 859155), (33, 650875), (41, 523875), (55, 390525), (75, 286385), (123, 174625), (125, 171831), (127, 169125), (165, 130175), (205, 104775), (275, 78105), (375, 57277), (381, 56375), (451, 47625), (615, 34925), (635, 33825), (825, 26035), (1025, 20955), (1353, 15875), (1375, 15621), (1397, 15375), (1905, 11275), (2255, 9525), (3075, 6985), (3175, 6765), (4125, 5207), (4191, 5125)]