21997261

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{199}}^1\times {\mathrm{773}}^1$

素因数の和:996

約数の個数: 16

約数和(自身を含む): 26006400

約数和(自身を除く): 4009139

約数列:

[1, 11, 13, 143, 199, 773, 2189, 2587, 8503, 10049, 28457, 110539, 153827, 1692097, 1999751, 21997261]

約数ペア:

[(1, 21997261), (11, 1999751), (13, 1692097), (143, 153827), (199, 110539), (773, 28457), (2189, 10049), (2587, 8503)]