19718521

素因数分解:

${\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:153

約数の個数: 32

約数和(自身を含む): 23639040

約数和(自身を除く): 3920519

約数列:

[1, 17, 23, 29, 37, 47, 391, 493, 629, 667, 799, 851, 1073, 1081, 1363, 1739, 11339, 14467, 18241, 18377, 23171, 24679, 29563, 31349, 39997, 50431, 419543, 532933, 679949, 857327, 1159913, 19718521]

約数ペア:

[(1, 19718521), (17, 1159913), (23, 857327), (29, 679949), (37, 532933), (47, 419543), (391, 50431), (493, 39997), (629, 31349), (667, 29563), (799, 24679), (851, 23171), (1073, 18377), (1081, 18241), (1363, 14467), (1739, 11339)]