20019519

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{397}}^1\times {\mathrm{431}}^1$

素因数の和:847

約数の個数: 24

約数和(自身を含む): 31292352

約数和(自身を除く): 11272833

約数列:

[1, 3, 9, 13, 39, 117, 397, 431, 1191, 1293, 3573, 3879, 5161, 5603, 15483, 16809, 46449, 50427, 171107, 513321, 1539963, 2224391, 6673173, 20019519]

約数ペア:

[(1, 20019519), (3, 6673173), (9, 2224391), (13, 1539963), (39, 513321), (117, 171107), (397, 50427), (431, 46449), (1191, 16809), (1293, 15483), (3573, 5603), (3879, 5161)]