64421680

素因数分解:

$2^4\times 5^1\times {\mathrm{805271}}^1$

素因数の和:805284

約数の個数: 20

約数和(自身を含む): 149780592

約数和(自身を除く): 85358912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 805271, 1610542, 3221084, 4026355, 6442168, 8052710, 12884336, 16105420, 32210840, 64421680]

約数ペア:

[(1, 64421680), (2, 32210840), (4, 16105420), (5, 12884336), (8, 8052710), (10, 6442168), (16, 4026355), (20, 3221084), (40, 1610542), (80, 805271)]