64439720

素因数分解:

$2^3\times 5^1\times {\mathrm{1610993}}^1$

素因数の和:1611004

約数の個数: 16

約数和(自身を含む): 144989460

約数和(自身を除く): 80549740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1610993, 3221986, 6443972, 8054965, 12887944, 16109930, 32219860, 64439720]

約数ペア:

[(1, 64439720), (2, 32219860), (4, 16109930), (5, 12887944), (8, 8054965), (10, 6443972), (20, 3221986), (40, 1610993)]