21721445

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{127}}^1\times {\mathrm{433}}^1$

素因数の和:644

約数の個数: 16

約数和(自身を含む): 26664960

約数和(自身を除く): 4943515

約数列:

[1, 5, 79, 127, 395, 433, 635, 2165, 10033, 34207, 50165, 54991, 171035, 274955, 4344289, 21721445]

約数ペア:

[(1, 21721445), (5, 4344289), (79, 274955), (127, 171035), (395, 54991), (433, 50165), (635, 34207), (2165, 10033)]