81726561

素因数分解:

$3^2\times 7^2\times {\mathrm{47}}^1\times {\mathrm{3943}}^1$

素因数の和:4010

約数の個数: 36

約数和(自身を含む): 140280192

約数和(自身を除く): 58553631

約数列:

[1, 3, 7, 9, 21, 47, 49, 63, 141, 147, 329, 423, 441, 987, 2303, 2961, 3943, 6909, 11829, 20727, 27601, 35487, 82803, 185321, 193207, 248409, 555963, 579621, 1297247, 1667889, 1738863, 3891741, 9080729, 11675223, 27242187, 81726561]

約数ペア:

[(1, 81726561), (3, 27242187), (7, 11675223), (9, 9080729), (21, 3891741), (47, 1738863), (49, 1667889), (63, 1297247), (141, 579621), (147, 555963), (329, 248409), (423, 193207), (441, 185321), (987, 82803), (2303, 35487), (2961, 27601), (3943, 20727), (6909, 11829)]