638967021

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{229}}^1\times {\mathrm{257}}^1$

素因数の和:554

約数の個数: 64

約数和(自身を含む): 1093754880

約数和(自身を除く): 454787859

約数列:

[1, 3, 7, 11, 21, 33, 47, 77, 141, 229, 231, 257, 329, 517, 687, 771, 987, 1551, 1603, 1799, 2519, 2827, 3619, 4809, 5397, 7557, 8481, 10763, 10857, 12079, 17633, 19789, 32289, 36237, 52899, 58853, 59367, 75341, 84553, 118393, 132869, 176559, 226023, 253659, 355179, 398607, 411971, 647383, 828751, 930083, 1235913, 1942149, 2486253, 2766091, 2790249, 4531681, 8298273, 13595043, 19362637, 30427001, 58087911, 91281003, 212989007, 638967021]

約数ペア:

[(1, 638967021), (3, 212989007), (7, 91281003), (11, 58087911), (21, 30427001), (33, 19362637), (47, 13595043), (77, 8298273), (141, 4531681), (229, 2790249), (231, 2766091), (257, 2486253), (329, 1942149), (517, 1235913), (687, 930083), (771, 828751), (987, 647383), (1551, 411971), (1603, 398607), (1799, 355179), (2519, 253659), (2827, 226023), (3619, 176559), (4809, 132869), (5397, 118393), (7557, 84553), (8481, 75341), (10763, 59367), (10857, 58853), (12079, 52899), (17633, 36237), (19789, 32289)]