21081786

素因数分解:

$2^1\times 3^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:239

約数の個数: 64

約数和(自身を含む): 48263040

約数和(自身を除く): 27181254

約数列:

[1, 2, 3, 6, 11, 22, 33, 37, 66, 74, 89, 97, 111, 178, 194, 222, 267, 291, 407, 534, 582, 814, 979, 1067, 1221, 1958, 2134, 2442, 2937, 3201, 3293, 3589, 5874, 6402, 6586, 7178, 8633, 9879, 10767, 17266, 19758, 21534, 25899, 36223, 39479, 51798, 72446, 78958, 94963, 108669, 118437, 189926, 217338, 236874, 284889, 319421, 569778, 638842, 958263, 1916526, 3513631, 7027262, 10540893, 21081786]

約数ペア:

[(1, 21081786), (2, 10540893), (3, 7027262), (6, 3513631), (11, 1916526), (22, 958263), (33, 638842), (37, 569778), (66, 319421), (74, 284889), (89, 236874), (97, 217338), (111, 189926), (178, 118437), (194, 108669), (222, 94963), (267, 78958), (291, 72446), (407, 51798), (534, 39479), (582, 36223), (814, 25899), (979, 21534), (1067, 19758), (1221, 17266), (1958, 10767), (2134, 9879), (2442, 8633), (2937, 7178), (3201, 6586), (3293, 6402), (3589, 5874)]