81708669

素因数分解:

$3^4\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2719}}^1$

素因数の和:2791

約数の個数: 40

約数和(自身を含む): 142179840

約数和(自身を除く): 60471171

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 81, 159, 189, 371, 477, 567, 1113, 1431, 2719, 3339, 4293, 8157, 10017, 19033, 24471, 30051, 57099, 73413, 144107, 171297, 220239, 432321, 513891, 1008749, 1296963, 1541673, 3026247, 3890889, 9078741, 11672667, 27236223, 81708669]

約数ペア:

[(1, 81708669), (3, 27236223), (7, 11672667), (9, 9078741), (21, 3890889), (27, 3026247), (53, 1541673), (63, 1296963), (81, 1008749), (159, 513891), (189, 432321), (371, 220239), (477, 171297), (567, 144107), (1113, 73413), (1431, 57099), (2719, 30051), (3339, 24471), (4293, 19033), (8157, 10017)]