256191640

素因数分解:

$2^3\times 5^1\times {\mathrm{6404791}}^1$

素因数の和:6404802

約数の個数: 16

約数和(自身を含む): 576431280

約数和(自身を除く): 320239640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 6404791, 12809582, 25619164, 32023955, 51238328, 64047910, 128095820, 256191640]

約数ペア:

[(1, 256191640), (2, 128095820), (4, 64047910), (5, 51238328), (8, 32023955), (10, 25619164), (20, 12809582), (40, 6404791)]