81280045

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{137}}^1$

素因数の和:250

約数の個数: 64

約数和(自身を含む): 129724416

約数和(自身を除く): 48444371

約数列:

[1, 5, 7, 11, 23, 35, 55, 67, 77, 115, 137, 161, 253, 335, 385, 469, 685, 737, 805, 959, 1265, 1507, 1541, 1771, 2345, 3151, 3685, 4795, 5159, 7535, 7705, 8855, 9179, 10549, 10787, 15755, 16951, 22057, 25795, 34661, 45895, 52745, 53935, 64253, 84755, 100969, 110285, 118657, 173305, 211117, 242627, 321265, 504845, 593285, 706783, 1055585, 1213135, 1477819, 2322287, 3533915, 7389095, 11611435, 16256009, 81280045]

約数ペア:

[(1, 81280045), (5, 16256009), (7, 11611435), (11, 7389095), (23, 3533915), (35, 2322287), (55, 1477819), (67, 1213135), (77, 1055585), (115, 706783), (137, 593285), (161, 504845), (253, 321265), (335, 242627), (385, 211117), (469, 173305), (685, 118657), (737, 110285), (805, 100969), (959, 84755), (1265, 64253), (1507, 53935), (1541, 52745), (1771, 45895), (2345, 34661), (3151, 25795), (3685, 22057), (4795, 16951), (5159, 15755), (7535, 10787), (7705, 10549), (8855, 9179)]