64869680

素因数分解:

$2^4\times 5^1\times {\mathrm{810871}}^1$

素因数の和:810884

約数の個数: 20

約数和(自身を含む): 150822192

約数和(自身を除く): 85952512

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810871, 1621742, 3243484, 4054355, 6486968, 8108710, 12973936, 16217420, 32434840, 64869680]

約数ペア:

[(1, 64869680), (2, 32434840), (4, 16217420), (5, 12973936), (8, 8108710), (10, 6486968), (16, 4054355), (20, 3243484), (40, 1621742), (80, 810871)]