81045520

素因数分解:

$2^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{24709}}^1$

素因数の和:24763

約数の個数: 40

約数和(自身を含む): 193034520

約数和(自身を除く): 111989000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 41, 80, 82, 164, 205, 328, 410, 656, 820, 1640, 3280, 24709, 49418, 98836, 123545, 197672, 247090, 395344, 494180, 988360, 1013069, 1976720, 2026138, 4052276, 5065345, 8104552, 10130690, 16209104, 20261380, 40522760, 81045520]

約数ペア:

[(1, 81045520), (2, 40522760), (4, 20261380), (5, 16209104), (8, 10130690), (10, 8104552), (16, 5065345), (20, 4052276), (40, 2026138), (41, 1976720), (80, 1013069), (82, 988360), (164, 494180), (205, 395344), (328, 247090), (410, 197672), (656, 123545), (820, 98836), (1640, 49418), (3280, 24709)]