19987221

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{109}}^1\times {\mathrm{3217}}^1$

素因数の和:3348

約数の個数: 16

約数和(自身を含む): 28318400

約数和(自身を除く): 8331179

約数列:

[1, 3, 19, 57, 109, 327, 2071, 3217, 6213, 9651, 61123, 183369, 350653, 1051959, 6662407, 19987221]

約数ペア:

[(1, 19987221), (3, 6662407), (19, 1051959), (57, 350653), (109, 183369), (327, 61123), (2071, 9651), (3217, 6213)]