20745880

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7741}}^1$

素因数の和:7819

約数の個数: 32

約数和(自身を含む): 47381040

約数和(自身を除く): 26635160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7741, 15482, 30964, 38705, 61928, 77410, 154820, 309640, 518647, 1037294, 2074588, 2593235, 4149176, 5186470, 10372940, 20745880]

約数ペア:

[(1, 20745880), (2, 10372940), (4, 5186470), (5, 4149176), (8, 2593235), (10, 2074588), (20, 1037294), (40, 518647), (67, 309640), (134, 154820), (268, 77410), (335, 61928), (536, 38705), (670, 30964), (1340, 15482), (2680, 7741)]