21257908

素因数分解:

$2^2\times 7^1\times {\mathrm{307}}^1\times {\mathrm{2473}}^1$

素因数の和:2791

約数の個数: 24

約数和(自身を含む): 42671552

約数和(自身を除く): 21413644

約数列:

[1, 2, 4, 7, 14, 28, 307, 614, 1228, 2149, 2473, 4298, 4946, 8596, 9892, 17311, 34622, 69244, 759211, 1518422, 3036844, 5314477, 10628954, 21257908]

約数ペア:

[(1, 21257908), (2, 10628954), (4, 5314477), (7, 3036844), (14, 1518422), (28, 759211), (307, 69244), (614, 34622), (1228, 17311), (2149, 9892), (2473, 8596), (4298, 4946)]