71851521

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:254

約数の個数: 64

約数和(自身を含む): 122961920

約数和(自身を除く): 51110399

約数列:

[1, 3, 7, 19, 21, 31, 37, 57, 93, 111, 133, 157, 217, 259, 399, 471, 589, 651, 703, 777, 1099, 1147, 1767, 2109, 2983, 3297, 3441, 4123, 4867, 4921, 5809, 8029, 8949, 12369, 14601, 14763, 17427, 20881, 21793, 24087, 34069, 40663, 62643, 65379, 92473, 102207, 110371, 121989, 152551, 180079, 277419, 331113, 457653, 540237, 647311, 772597, 1260553, 1941933, 2317791, 3421501, 3781659, 10264503, 23950507, 71851521]

約数ペア:

[(1, 71851521), (3, 23950507), (7, 10264503), (19, 3781659), (21, 3421501), (31, 2317791), (37, 1941933), (57, 1260553), (93, 772597), (111, 647311), (133, 540237), (157, 457653), (217, 331113), (259, 277419), (399, 180079), (471, 152551), (589, 121989), (651, 110371), (703, 102207), (777, 92473), (1099, 65379), (1147, 62643), (1767, 40663), (2109, 34069), (2983, 24087), (3297, 21793), (3441, 20881), (4123, 17427), (4867, 14763), (4921, 14601), (5809, 12369), (8029, 8949)]