81310257

素因数分解:

$3^3\times 7^2\times {\mathrm{41}}^1\times {\mathrm{1499}}^1$

素因数の和:1563

約数の個数: 48

約数和(自身を含む): 143640000

約数和(自身を除く): 62329743

約数列:

[1, 3, 7, 9, 21, 27, 41, 49, 63, 123, 147, 189, 287, 369, 441, 861, 1107, 1323, 1499, 2009, 2583, 4497, 6027, 7749, 10493, 13491, 18081, 31479, 40473, 54243, 61459, 73451, 94437, 184377, 220353, 283311, 430213, 553131, 661059, 1290639, 1659393, 1983177, 3011491, 3871917, 9034473, 11615751, 27103419, 81310257]

約数ペア:

[(1, 81310257), (3, 27103419), (7, 11615751), (9, 9034473), (21, 3871917), (27, 3011491), (41, 1983177), (49, 1659393), (63, 1290639), (123, 661059), (147, 553131), (189, 430213), (287, 283311), (369, 220353), (441, 184377), (861, 94437), (1107, 73451), (1323, 61459), (1499, 54243), (2009, 40473), (2583, 31479), (4497, 18081), (6027, 13491), (7749, 10493)]