21019810

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{6389}}^1$

素因数の和:6450

約数の個数: 32

約数和(自身を含む): 44167680

約数和(自身を除く): 23147870

約数列:

[1, 2, 5, 7, 10, 14, 35, 47, 70, 94, 235, 329, 470, 658, 1645, 3290, 6389, 12778, 31945, 44723, 63890, 89446, 223615, 300283, 447230, 600566, 1501415, 2101981, 3002830, 4203962, 10509905, 21019810]

約数ペア:

[(1, 21019810), (2, 10509905), (5, 4203962), (7, 3002830), (10, 2101981), (14, 1501415), (35, 600566), (47, 447230), (70, 300283), (94, 223615), (235, 89446), (329, 63890), (470, 44723), (658, 31945), (1645, 12778), (3290, 6389)]