64839440

素因数分解:

$2^4\times 5^1\times {\mathrm{810493}}^1$

素因数の和:810506

約数の個数: 20

約数和(自身を含む): 150751884

約数和(自身を除く): 85912444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 810493, 1620986, 3241972, 4052465, 6483944, 8104930, 12967888, 16209860, 32419720, 64839440]

約数ペア:

[(1, 64839440), (2, 32419720), (4, 16209860), (5, 12967888), (8, 8104930), (10, 6483944), (16, 4052465), (20, 3241972), (40, 1620986), (80, 810493)]