20188502480

素因数分解:

$2^4\times 5^1\times {\mathrm{643}}^1\times {\mathrm{392467}}^1$

素因数の和:393123

約数の個数: 40

約数和(自身を含む): 47011386912

約数和(自身を除く): 26822884432

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 643, 1286, 2572, 3215, 5144, 6430, 10288, 12860, 25720, 51440, 392467, 784934, 1569868, 1962335, 3139736, 3924670, 6279472, 7849340, 15698680, 31397360, 252356281, 504712562, 1009425124, 1261781405, 2018850248, 2523562810, 4037700496, 5047125620, 10094251240, 20188502480]

約数ペア:

[(1, 20188502480), (2, 10094251240), (4, 5047125620), (5, 4037700496), (8, 2523562810), (10, 2018850248), (16, 1261781405), (20, 1009425124), (40, 504712562), (80, 252356281), (643, 31397360), (1286, 15698680), (2572, 7849340), (3215, 6279472), (5144, 3924670), (6430, 3139736), (10288, 1962335), (12860, 1569868), (25720, 784934), (51440, 392467)]