81949945

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{659}}^1$

素因数の和:718

約数の個数: 64

約数和(自身を含む): 136857600

約数和(自身を除く): 54907655

約数列:

[1, 5, 7, 11, 17, 19, 35, 55, 77, 85, 95, 119, 133, 187, 209, 323, 385, 595, 659, 665, 935, 1045, 1309, 1463, 1615, 2261, 3295, 3553, 4613, 6545, 7249, 7315, 11203, 11305, 12521, 17765, 23065, 24871, 36245, 50743, 56015, 62605, 78421, 87647, 123233, 124355, 137731, 212857, 253715, 392105, 438235, 616165, 688655, 862631, 964117, 1064285, 1489999, 2341427, 4313155, 4820585, 7449995, 11707135, 16389989, 81949945]

約数ペア:

[(1, 81949945), (5, 16389989), (7, 11707135), (11, 7449995), (17, 4820585), (19, 4313155), (35, 2341427), (55, 1489999), (77, 1064285), (85, 964117), (95, 862631), (119, 688655), (133, 616165), (187, 438235), (209, 392105), (323, 253715), (385, 212857), (595, 137731), (659, 124355), (665, 123233), (935, 87647), (1045, 78421), (1309, 62605), (1463, 56015), (1615, 50743), (2261, 36245), (3295, 24871), (3553, 23065), (4613, 17765), (6545, 12521), (7249, 11305), (7315, 11203)]