640320396

素因数分解:

$2^2\times 3^1\times {\mathrm{43}}^1\times {\mathrm{1240931}}^1$

素因数の和:1240981

約数の個数: 24

約数和(自身を含む): 1528828224

約数和(自身を除く): 888507828

約数列:

[1, 2, 3, 4, 6, 12, 43, 86, 129, 172, 258, 516, 1240931, 2481862, 3722793, 4963724, 7445586, 14891172, 53360033, 106720066, 160080099, 213440132, 320160198, 640320396]

約数ペア:

[(1, 640320396), (2, 320160198), (3, 213440132), (4, 160080099), (6, 106720066), (12, 53360033), (43, 14891172), (86, 7445586), (129, 4963724), (172, 3722793), (258, 2481862), (516, 1240931)]