1285120

素因数分解:

$2^{10}\times 5^1\times {\mathrm{251}}^1$

素因数の和:276

約数の個数: 44

約数和(自身を含む): 3095064

約数和(自身を除く): 1809944

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 251, 256, 320, 502, 512, 640, 1004, 1024, 1255, 1280, 2008, 2510, 2560, 4016, 5020, 5120, 8032, 10040, 16064, 20080, 32128, 40160, 64256, 80320, 128512, 160640, 257024, 321280, 642560, 1285120]

約数ペア:

[(1, 1285120), (2, 642560), (4, 321280), (5, 257024), (8, 160640), (10, 128512), (16, 80320), (20, 64256), (32, 40160), (40, 32128), (64, 20080), (80, 16064), (128, 10040), (160, 8032), (251, 5120), (256, 5020), (320, 4016), (502, 2560), (512, 2510), (640, 2008), (1004, 1280), (1024, 1255)]