1256960

素因数分解:

$2^9\times 5^1\times {\mathrm{491}}^1$

素因数の和:514

約数の個数: 40

約数和(自身を含む): 3019896

約数和(自身を除く): 1762936

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 491, 512, 640, 982, 1280, 1964, 2455, 2560, 3928, 4910, 7856, 9820, 15712, 19640, 31424, 39280, 62848, 78560, 125696, 157120, 251392, 314240, 628480, 1256960]

約数ペア:

[(1, 1256960), (2, 628480), (4, 314240), (5, 251392), (8, 157120), (10, 125696), (16, 78560), (20, 62848), (32, 39280), (40, 31424), (64, 19640), (80, 15712), (128, 9820), (160, 7856), (256, 4910), (320, 3928), (491, 2560), (512, 2455), (640, 1964), (982, 1280)]