81519540

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{2113}}^1$

素因数の和:2768

約数の個数: 48

約数和(自身を含む): 228717888

約数和(自身を除く): 147198348

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 643, 1286, 1929, 2113, 2572, 3215, 3858, 4226, 6339, 6430, 7716, 8452, 9645, 10565, 12678, 12860, 19290, 21130, 25356, 31695, 38580, 42260, 63390, 126780, 1358659, 2717318, 4075977, 5434636, 6793295, 8151954, 13586590, 16303908, 20379885, 27173180, 40759770, 81519540]

約数ペア:

[(1, 81519540), (2, 40759770), (3, 27173180), (4, 20379885), (5, 16303908), (6, 13586590), (10, 8151954), (12, 6793295), (15, 5434636), (20, 4075977), (30, 2717318), (60, 1358659), (643, 126780), (1286, 63390), (1929, 42260), (2113, 38580), (2572, 31695), (3215, 25356), (3858, 21130), (4226, 19290), (6339, 12860), (6430, 12678), (7716, 10565), (8452, 9645)]