640417791

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{43}}^2\times {\mathrm{83}}^1\times {\mathrm{107}}^1$

素因数の和:292

約数の個数: 48

約数和(自身を含む): 961704576

約数和(自身を除く): 321286785

約数列:

[1, 3, 13, 39, 43, 83, 107, 129, 249, 321, 559, 1079, 1391, 1677, 1849, 3237, 3569, 4173, 4601, 5547, 8881, 10707, 13803, 24037, 26643, 46397, 59813, 72111, 115453, 139191, 153467, 179439, 197843, 346359, 381883, 460401, 593529, 1145649, 1995071, 2571959, 4964479, 5985213, 7715877, 14893437, 16420969, 49262907, 213472597, 640417791]

約数ペア:

[(1, 640417791), (3, 213472597), (13, 49262907), (39, 16420969), (43, 14893437), (83, 7715877), (107, 5985213), (129, 4964479), (249, 2571959), (321, 1995071), (559, 1145649), (1079, 593529), (1391, 460401), (1677, 381883), (1849, 346359), (3237, 197843), (3569, 179439), (4173, 153467), (4601, 139191), (5547, 115453), (8881, 72111), (10707, 59813), (13803, 46397), (24037, 26643)]