81560895

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:272

約数の個数: 64

約数和(自身を含む): 146893824

約数和(自身を除く): 65332929

約数列:

[1, 3, 5, 13, 15, 39, 43, 65, 71, 129, 137, 195, 213, 215, 355, 411, 559, 645, 685, 923, 1065, 1677, 1781, 2055, 2769, 2795, 3053, 4615, 5343, 5891, 8385, 8905, 9159, 9727, 13845, 15265, 17673, 26715, 29181, 29455, 39689, 45795, 48635, 76583, 88365, 119067, 126451, 145905, 198445, 229749, 379353, 382915, 418261, 595335, 632255, 1148745, 1254783, 1896765, 2091305, 5437393, 6273915, 16312179, 27186965, 81560895]

約数ペア:

[(1, 81560895), (3, 27186965), (5, 16312179), (13, 6273915), (15, 5437393), (39, 2091305), (43, 1896765), (65, 1254783), (71, 1148745), (129, 632255), (137, 595335), (195, 418261), (213, 382915), (215, 379353), (355, 229749), (411, 198445), (559, 145905), (645, 126451), (685, 119067), (923, 88365), (1065, 76583), (1677, 48635), (1781, 45795), (2055, 39689), (2769, 29455), (2795, 29181), (3053, 26715), (4615, 17673), (5343, 15265), (5891, 13845), (8385, 9727), (8905, 9159)]