81167905

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{229}}^1$

素因数の和:314

約数の個数: 64

約数和(自身を含む): 129830400

約数和(自身を除く): 48662495

約数列:

[1, 5, 7, 13, 19, 35, 41, 65, 91, 95, 133, 205, 229, 247, 287, 455, 533, 665, 779, 1145, 1235, 1435, 1603, 1729, 2665, 2977, 3731, 3895, 4351, 5453, 8015, 8645, 9389, 10127, 14885, 18655, 20839, 21755, 27265, 30457, 46945, 50635, 56563, 65723, 70889, 104195, 122057, 152285, 178391, 282815, 328615, 354445, 395941, 610285, 854399, 891955, 1248737, 1979705, 2319083, 4271995, 6243685, 11595415, 16233581, 81167905]

約数ペア:

[(1, 81167905), (5, 16233581), (7, 11595415), (13, 6243685), (19, 4271995), (35, 2319083), (41, 1979705), (65, 1248737), (91, 891955), (95, 854399), (133, 610285), (205, 395941), (229, 354445), (247, 328615), (287, 282815), (455, 178391), (533, 152285), (665, 122057), (779, 104195), (1145, 70889), (1235, 65723), (1435, 56563), (1603, 50635), (1729, 46945), (2665, 30457), (2977, 27265), (3731, 21755), (3895, 20839), (4351, 18655), (5453, 14885), (8015, 10127), (8645, 9389)]