640923444

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{997}}^1\times {\mathrm{2551}}^1$

素因数の和:3565

約数の個数: 72

約数和(自身を含む): 1854140288

約数和(自身を除く): 1213216844

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 63, 84, 126, 252, 997, 1994, 2551, 2991, 3988, 5102, 5982, 6979, 7653, 8973, 10204, 11964, 13958, 15306, 17857, 17946, 20937, 22959, 27916, 30612, 35714, 35892, 41874, 45918, 53571, 62811, 71428, 83748, 91836, 107142, 125622, 160713, 214284, 251244, 321426, 642852, 2543347, 5086694, 7630041, 10173388, 15260082, 17803429, 22890123, 30520164, 35606858, 45780246, 53410287, 71213716, 91560492, 106820574, 160230861, 213641148, 320461722, 640923444]

約数ペア:

[(1, 640923444), (2, 320461722), (3, 213641148), (4, 160230861), (6, 106820574), (7, 91560492), (9, 71213716), (12, 53410287), (14, 45780246), (18, 35606858), (21, 30520164), (28, 22890123), (36, 17803429), (42, 15260082), (63, 10173388), (84, 7630041), (126, 5086694), (252, 2543347), (997, 642852), (1994, 321426), (2551, 251244), (2991, 214284), (3988, 160713), (5102, 125622), (5982, 107142), (6979, 91836), (7653, 83748), (8973, 71428), (10204, 62811), (11964, 53571), (13958, 45918), (15306, 41874), (17857, 35892), (17946, 35714), (20937, 30612), (22959, 27916)]