81175420

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{41843}}^1$

素因数の和:41949

約数の個数: 24

約数和(自身を含む): 172229904

約数和(自身を除く): 91054484

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 41843, 83686, 167372, 209215, 418430, 836860, 4058771, 8117542, 16235084, 20293855, 40587710, 81175420]

約数ペア:

[(1, 81175420), (2, 40587710), (4, 20293855), (5, 16235084), (10, 8117542), (20, 4058771), (97, 836860), (194, 418430), (388, 209215), (485, 167372), (970, 83686), (1940, 41843)]