640048

素因数分解:

$2^4\times {\mathrm{109}}^1\times {\mathrm{367}}^1$

素因数の和:484

約数の個数: 20

約数和(自身を含む): 1254880

約数和(自身を除く): 614832

約数列:

[1, 2, 4, 8, 16, 109, 218, 367, 436, 734, 872, 1468, 1744, 2936, 5872, 40003, 80006, 160012, 320024, 640048]

約数ペア:

[(1, 640048), (2, 320024), (4, 160012), (8, 80006), (16, 40003), (109, 5872), (218, 2936), (367, 1744), (436, 1468), (734, 872)]