21478772

素因数分解:

$2^2\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1193}}^1$

素因数の和:1847

約数の個数: 24

約数和(自身を含む): 43060416

約数和(自身を除く): 21581644

約数列:

[1, 2, 4, 7, 14, 28, 643, 1193, 1286, 2386, 2572, 4501, 4772, 8351, 9002, 16702, 18004, 33404, 767099, 1534198, 3068396, 5369693, 10739386, 21478772]

約数ペア:

[(1, 21478772), (2, 10739386), (4, 5369693), (7, 3068396), (14, 1534198), (28, 767099), (643, 33404), (1193, 18004), (1286, 16702), (2386, 9002), (2572, 8351), (4501, 4772)]