21556868

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{3187}}^1$

素因数の和:3299

約数の個数: 24

約数和(自身を含む): 40168800

約数和(自身を除く): 18611932

約数列:

[1, 2, 4, 19, 38, 76, 89, 178, 356, 1691, 3187, 3382, 6374, 6764, 12748, 60553, 121106, 242212, 283643, 567286, 1134572, 5389217, 10778434, 21556868]

約数ペア:

[(1, 21556868), (2, 10778434), (4, 5389217), (19, 1134572), (38, 567286), (76, 283643), (89, 242212), (178, 121106), (356, 60553), (1691, 12748), (3187, 6764), (3382, 6374)]