19987455

素因数分解:

$3^1\times 5^1\times {\mathrm{47}}^1\times {\mathrm{28351}}^1$

素因数の和:28406

約数の個数: 16

約数和(自身を含む): 32661504

約数和(自身を除く): 12674049

約数列:

[1, 3, 5, 15, 47, 141, 235, 705, 28351, 85053, 141755, 425265, 1332497, 3997491, 6662485, 19987455]

約数ペア:

[(1, 19987455), (3, 6662485), (5, 3997491), (15, 1332497), (47, 425265), (141, 141755), (235, 85053), (705, 28351)]