66981680

素因数分解:

$2^4\times 5^1\times {\mathrm{837271}}^1$

素因数の和:837284

約数の個数: 20

約数和(自身を含む): 155732592

約数和(自身を除く): 88750912

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 837271, 1674542, 3349084, 4186355, 6698168, 8372710, 13396336, 16745420, 33490840, 66981680]

約数ペア:

[(1, 66981680), (2, 33490840), (4, 16745420), (5, 13396336), (8, 8372710), (10, 6698168), (16, 4186355), (20, 3349084), (40, 1674542), (80, 837271)]