12720785

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1$

素因数の和:126

約数の個数: 64

約数和(自身を含む): 21012480

約数和(自身を除く): 8291695

約数列:

[1, 5, 7, 11, 19, 35, 37, 47, 55, 77, 95, 133, 185, 209, 235, 259, 329, 385, 407, 517, 665, 703, 893, 1045, 1295, 1463, 1645, 1739, 2035, 2585, 2849, 3515, 3619, 4465, 4921, 6251, 7315, 7733, 8695, 9823, 12173, 14245, 18095, 19129, 24605, 31255, 33041, 38665, 49115, 54131, 60865, 68761, 95645, 133903, 165205, 231287, 270655, 343805, 363451, 669515, 1156435, 1817255, 2544157, 12720785]

約数ペア:

[(1, 12720785), (5, 2544157), (7, 1817255), (11, 1156435), (19, 669515), (35, 363451), (37, 343805), (47, 270655), (55, 231287), (77, 165205), (95, 133903), (133, 95645), (185, 68761), (209, 60865), (235, 54131), (259, 49115), (329, 38665), (385, 33041), (407, 31255), (517, 24605), (665, 19129), (703, 18095), (893, 14245), (1045, 12173), (1295, 9823), (1463, 8695), (1645, 7733), (1739, 7315), (2035, 6251), (2585, 4921), (2849, 4465), (3515, 3619)]