21597868

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{199}}^1\times {\mathrm{631}}^1$

素因数の和:877

約数の個数: 24

約数和(自身を含む): 38931200

約数和(自身を除く): 17333332

約数列:

[1, 2, 4, 43, 86, 172, 199, 398, 631, 796, 1262, 2524, 8557, 17114, 27133, 34228, 54266, 108532, 125569, 251138, 502276, 5399467, 10798934, 21597868]

約数ペア:

[(1, 21597868), (2, 10798934), (4, 5399467), (43, 502276), (86, 251138), (172, 125569), (199, 108532), (398, 54266), (631, 34228), (796, 27133), (1262, 17114), (2524, 8557)]