81173757

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{131}}^1\times {\mathrm{1553}}^1$

素因数の和:1713

約数の個数: 32

約数和(自身を含む): 131281920

約数和(自身を除く): 50108163

約数列:

[1, 3, 7, 19, 21, 57, 131, 133, 393, 399, 917, 1553, 2489, 2751, 4659, 7467, 10871, 17423, 29507, 32613, 52269, 88521, 203443, 206549, 610329, 619647, 1424101, 3865417, 4272303, 11596251, 27057919, 81173757]

約数ペア:

[(1, 81173757), (3, 27057919), (7, 11596251), (19, 4272303), (21, 3865417), (57, 1424101), (131, 619647), (133, 610329), (393, 206549), (399, 203443), (917, 88521), (1553, 52269), (2489, 32613), (2751, 29507), (4659, 17423), (7467, 10871)]