781284

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:216

約数の個数: 48

約数和(自身を含む): 2128896

約数和(自身を除く): 1347612

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 71, 84, 131, 142, 213, 262, 284, 393, 426, 497, 524, 786, 852, 917, 994, 1491, 1572, 1834, 1988, 2751, 2982, 3668, 5502, 5964, 9301, 11004, 18602, 27903, 37204, 55806, 65107, 111612, 130214, 195321, 260428, 390642, 781284]

約数ペア:

[(1, 781284), (2, 390642), (3, 260428), (4, 195321), (6, 130214), (7, 111612), (12, 65107), (14, 55806), (21, 37204), (28, 27903), (42, 18602), (71, 11004), (84, 9301), (131, 5964), (142, 5502), (213, 3668), (262, 2982), (284, 2751), (393, 1988), (426, 1834), (497, 1572), (524, 1491), (786, 994), (852, 917)]