81312255

素因数分解:

$3^4\times 5^1\times {\mathrm{200771}}^1$

素因数の和:200788

約数の個数: 20

約数和(自身を含む): 145760472

約数和(自身を除く): 64448217

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 200771, 602313, 1003855, 1806939, 3011565, 5420817, 9034695, 16262451, 27104085, 81312255]

約数ペア:

[(1, 81312255), (3, 27104085), (5, 16262451), (9, 9034695), (15, 5420817), (27, 3011565), (45, 1806939), (81, 1003855), (135, 602313), (405, 200771)]