19992015

素因数分解:

$3^4\times 5^1\times {\mathrm{49363}}^1$

素因数の和:49380

約数の個数: 20

約数和(自身を含む): 35838264

約数和(自身を除く): 15846249

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49363, 148089, 246815, 444267, 740445, 1332801, 2221335, 3998403, 6664005, 19992015]

約数ペア:

[(1, 19992015), (3, 6664005), (5, 3998403), (9, 2221335), (15, 1332801), (27, 740445), (45, 444267), (81, 246815), (135, 148089), (405, 49363)]