20864781

素因数分解:

$3^2\times 7^1\times {\mathrm{37}}^1\times {\mathrm{8951}}^1$

素因数の和:9001

約数の個数: 24

約数和(自身を含む): 35378304

約数和(自身を除く): 14513523

約数列:

[1, 3, 7, 9, 21, 37, 63, 111, 259, 333, 777, 2331, 8951, 26853, 62657, 80559, 187971, 331187, 563913, 993561, 2318309, 2980683, 6954927, 20864781]

約数ペア:

[(1, 20864781), (3, 6954927), (7, 2980683), (9, 2318309), (21, 993561), (37, 563913), (63, 331187), (111, 187971), (259, 80559), (333, 62657), (777, 26853), (2331, 8951)]