21278456

素因数分解:

$2^3\times {\mathrm{613}}^1\times {\mathrm{4339}}^1$

素因数の和:4958

約数の個数: 16

約数和(自身を含む): 39971400

約数和(自身を除く): 18692944

約数列:

[1, 2, 4, 8, 613, 1226, 2452, 4339, 4904, 8678, 17356, 34712, 2659807, 5319614, 10639228, 21278456]

約数ペア:

[(1, 21278456), (2, 10639228), (4, 5319614), (8, 2659807), (613, 34712), (1226, 17356), (2452, 8678), (4339, 4904)]