81267660

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{353}}^1\times {\mathrm{1279}}^1$

素因数の和:1647

約数の個数: 72

約数和(自身を含む): 247403520

約数和(自身を除く): 166135860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 353, 706, 1059, 1279, 1412, 1765, 2118, 2558, 3177, 3530, 3837, 4236, 5116, 5295, 6354, 6395, 7060, 7674, 10590, 11511, 12708, 12790, 15348, 15885, 19185, 21180, 23022, 25580, 31770, 38370, 46044, 57555, 63540, 76740, 115110, 230220, 451487, 902974, 1354461, 1805948, 2257435, 2708922, 4063383, 4514870, 5417844, 6772305, 8126766, 9029740, 13544610, 16253532, 20316915, 27089220, 40633830, 81267660]

約数ペア:

[(1, 81267660), (2, 40633830), (3, 27089220), (4, 20316915), (5, 16253532), (6, 13544610), (9, 9029740), (10, 8126766), (12, 6772305), (15, 5417844), (18, 4514870), (20, 4063383), (30, 2708922), (36, 2257435), (45, 1805948), (60, 1354461), (90, 902974), (180, 451487), (353, 230220), (706, 115110), (1059, 76740), (1279, 63540), (1412, 57555), (1765, 46044), (2118, 38370), (2558, 31770), (3177, 25580), (3530, 23022), (3837, 21180), (4236, 19185), (5116, 15885), (5295, 15348), (6354, 12790), (6395, 12708), (7060, 11511), (7674, 10590)]