661245980

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{1740121}}^1$

素因数の和:1740149

約数の個数: 24

約数和(自身を含む): 1461702480

約数和(自身を除く): 800456500

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 1740121, 3480242, 6960484, 8700605, 17401210, 33062299, 34802420, 66124598, 132249196, 165311495, 330622990, 661245980]

約数ペア:

[(1, 661245980), (2, 330622990), (4, 165311495), (5, 132249196), (10, 66124598), (19, 34802420), (20, 33062299), (38, 17401210), (76, 8700605), (95, 6960484), (190, 3480242), (380, 1740121)]