21230209

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{167}}^1$

素因数の和:325

約数の個数: 32

約数和(自身を含む): 28901376

約数和(自身を除く): 7671167

約数列:

[1, 7, 11, 13, 77, 91, 127, 143, 167, 889, 1001, 1169, 1397, 1651, 1837, 2171, 9779, 11557, 12859, 15197, 18161, 21209, 23881, 127127, 148463, 167167, 233299, 275717, 1633093, 1930019, 3032887, 21230209]

約数ペア:

[(1, 21230209), (7, 3032887), (11, 1930019), (13, 1633093), (77, 275717), (91, 233299), (127, 167167), (143, 148463), (167, 127127), (889, 23881), (1001, 21209), (1169, 18161), (1397, 15197), (1651, 12859), (1837, 11557), (2171, 9779)]