21879137

素因数分解:

$7^2\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 26778600

約数和(自身を除く): 4899463

約数列:

[1, 7, 29, 49, 89, 173, 203, 623, 1211, 1421, 2581, 4361, 5017, 8477, 15397, 18067, 35119, 107779, 126469, 245833, 446513, 754453, 3125591, 21879137]

約数ペア:

[(1, 21879137), (7, 3125591), (29, 754453), (49, 446513), (89, 245833), (173, 126469), (203, 107779), (623, 35119), (1211, 18067), (1421, 15397), (2581, 8477), (4361, 5017)]