720885

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{257}}^1$

素因数の和:293

約数の個数: 32

約数和(自身を含む): 1337472

約数和(自身を除く): 616587

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 85, 165, 187, 255, 257, 561, 771, 935, 1285, 2805, 2827, 3855, 4369, 8481, 13107, 14135, 21845, 42405, 48059, 65535, 144177, 240295, 720885]

約数ペア:

[(1, 720885), (3, 240295), (5, 144177), (11, 65535), (15, 48059), (17, 42405), (33, 21845), (51, 14135), (55, 13107), (85, 8481), (165, 4369), (187, 3855), (255, 2827), (257, 2805), (561, 1285), (771, 935)]