80802040

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{409}}^1\times {\mathrm{449}}^1$

素因数の和:880

約数の個数: 64

約数和(自身を含む): 199260000

約数和(自身を除く): 118457960

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 409, 440, 449, 818, 898, 1636, 1796, 2045, 2245, 3272, 3592, 4090, 4490, 4499, 4939, 8180, 8980, 8998, 9878, 16360, 17960, 17996, 19756, 22495, 24695, 35992, 39512, 44990, 49390, 89980, 98780, 179960, 183641, 197560, 367282, 734564, 918205, 1469128, 1836410, 2020051, 3672820, 4040102, 7345640, 8080204, 10100255, 16160408, 20200510, 40401020, 80802040]

約数ペア:

[(1, 80802040), (2, 40401020), (4, 20200510), (5, 16160408), (8, 10100255), (10, 8080204), (11, 7345640), (20, 4040102), (22, 3672820), (40, 2020051), (44, 1836410), (55, 1469128), (88, 918205), (110, 734564), (220, 367282), (409, 197560), (440, 183641), (449, 179960), (818, 98780), (898, 89980), (1636, 49390), (1796, 44990), (2045, 39512), (2245, 35992), (3272, 24695), (3592, 22495), (4090, 19756), (4490, 17996), (4499, 17960), (4939, 16360), (8180, 9878), (8980, 8998)]