19640943

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4391}}^1$

素因数の和:4475

約数の個数: 24

約数和(自身を含む): 32887296

約数和(自身を除く): 13246353

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4391, 4473, 13173, 30737, 39519, 92211, 276633, 311761, 935283, 2182327, 2805849, 6546981, 19640943]

約数ペア:

[(1, 19640943), (3, 6546981), (7, 2805849), (9, 2182327), (21, 935283), (63, 311761), (71, 276633), (213, 92211), (497, 39519), (639, 30737), (1491, 13173), (4391, 4473)]