21175816

素因数分解:

$2^3\times {\mathrm{137}}^1\times {\mathrm{139}}^2$

素因数の和:421

約数の個数: 24

約数和(自身を含む): 40284270

約数和(自身を除く): 19108454

約数列:

[1, 2, 4, 8, 137, 139, 274, 278, 548, 556, 1096, 1112, 19043, 19321, 38086, 38642, 76172, 77284, 152344, 154568, 2646977, 5293954, 10587908, 21175816]

約数ペア:

[(1, 21175816), (2, 10587908), (4, 5293954), (8, 2646977), (137, 154568), (139, 152344), (274, 77284), (278, 76172), (548, 38642), (556, 38086), (1096, 19321), (1112, 19043)]