1987331355

素因数分解:

$3^4\times 5^1\times {\mathrm{4906991}}^1$

素因数の和:4907008

約数の個数: 20

約数和(自身を含む): 3562476192

約数和(自身を除く): 1575144837

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 4906991, 14720973, 24534955, 44162919, 73604865, 132488757, 220814595, 397466271, 662443785, 1987331355]

約数ペア:

[(1, 1987331355), (3, 662443785), (5, 397466271), (9, 220814595), (15, 132488757), (27, 73604865), (45, 44162919), (81, 24534955), (135, 14720973), (405, 4906991)]