20865928

素因数分解:

$2^3\times {\mathrm{37}}^1\times {\mathrm{157}}^1\times {\mathrm{449}}^1$

素因数の和:649

約数の個数: 32

約数和(自身を含む): 40527000

約数和(自身を除く): 19661072

約数列:

[1, 2, 4, 8, 37, 74, 148, 157, 296, 314, 449, 628, 898, 1256, 1796, 3592, 5809, 11618, 16613, 23236, 33226, 46472, 66452, 70493, 132904, 140986, 281972, 563944, 2608241, 5216482, 10432964, 20865928]

約数ペア:

[(1, 20865928), (2, 10432964), (4, 5216482), (8, 2608241), (37, 563944), (74, 281972), (148, 140986), (157, 132904), (296, 70493), (314, 66452), (449, 46472), (628, 33226), (898, 23236), (1256, 16613), (1796, 11618), (3592, 5809)]