21099717

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{61}}^1\times {\mathrm{557}}^1$

素因数の和:650

約数の個数: 32

約数和(自身を含む): 33212160

約数和(自身を除く): 12112443

約数列:

[1, 3, 9, 23, 27, 61, 69, 183, 207, 549, 557, 621, 1403, 1647, 1671, 4209, 5013, 12627, 12811, 15039, 33977, 37881, 38433, 101931, 115299, 305793, 345897, 781471, 917379, 2344413, 7033239, 21099717]

約数ペア:

[(1, 21099717), (3, 7033239), (9, 2344413), (23, 917379), (27, 781471), (61, 345897), (69, 305793), (183, 115299), (207, 101931), (549, 38433), (557, 37881), (621, 33977), (1403, 15039), (1647, 12811), (1671, 12627), (4209, 5013)]