388637457

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{83}}^1\times {\mathrm{89}}^1$

素因数の和:278

約数の個数: 64

約数和(自身を含む): 609638400

約数和(自身を除く): 221000943

約数列:

[1, 3, 13, 19, 39, 57, 71, 83, 89, 213, 247, 249, 267, 741, 923, 1079, 1157, 1349, 1577, 1691, 2769, 3237, 3471, 4047, 4731, 5073, 5893, 6319, 7387, 17537, 17679, 18957, 20501, 21983, 22161, 52611, 61503, 65949, 76609, 82147, 96031, 111967, 120061, 140353, 229827, 246441, 288093, 335901, 360183, 421059, 524477, 1455571, 1560793, 1573431, 1824589, 4366713, 4682379, 5473767, 6818201, 9965063, 20454603, 29895189, 129545819, 388637457]

約数ペア:

[(1, 388637457), (3, 129545819), (13, 29895189), (19, 20454603), (39, 9965063), (57, 6818201), (71, 5473767), (83, 4682379), (89, 4366713), (213, 1824589), (247, 1573431), (249, 1560793), (267, 1455571), (741, 524477), (923, 421059), (1079, 360183), (1157, 335901), (1349, 288093), (1577, 246441), (1691, 229827), (2769, 140353), (3237, 120061), (3471, 111967), (4047, 96031), (4731, 82147), (5073, 76609), (5893, 65949), (6319, 61503), (7387, 52611), (17537, 22161), (17679, 21983), (18957, 20501)]