80320000

素因数分解:

$2^9\times 5^4\times {\mathrm{251}}^1$

素因数の和:289

約数の個数: 100

約数和(自身を含む): 201338676

約数和(自身を除く): 121018676

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 251, 256, 320, 400, 500, 502, 512, 625, 640, 800, 1000, 1004, 1250, 1255, 1280, 1600, 2000, 2008, 2500, 2510, 2560, 3200, 4000, 4016, 5000, 5020, 6275, 6400, 8000, 8032, 10000, 10040, 12550, 12800, 16000, 16064, 20000, 20080, 25100, 31375, 32000, 32128, 40000, 40160, 50200, 62750, 64000, 64256, 80000, 80320, 100400, 125500, 128512, 156875, 160000, 160640, 200800, 251000, 313750, 320000, 321280, 401600, 502000, 627500, 642560, 803200, 1004000, 1255000, 1606400, 2008000, 2510000, 3212800, 4016000, 5020000, 8032000, 10040000, 16064000, 20080000, 40160000, 80320000]

約数ペア:

[(1, 80320000), (2, 40160000), (4, 20080000), (5, 16064000), (8, 10040000), (10, 8032000), (16, 5020000), (20, 4016000), (25, 3212800), (32, 2510000), (40, 2008000), (50, 1606400), (64, 1255000), (80, 1004000), (100, 803200), (125, 642560), (128, 627500), (160, 502000), (200, 401600), (250, 321280), (251, 320000), (256, 313750), (320, 251000), (400, 200800), (500, 160640), (502, 160000), (512, 156875), (625, 128512), (640, 125500), (800, 100400), (1000, 80320), (1004, 80000), (1250, 64256), (1255, 64000), (1280, 62750), (1600, 50200), (2000, 40160), (2008, 40000), (2500, 32128), (2510, 32000), (2560, 31375), (3200, 25100), (4000, 20080), (4016, 20000), (5000, 16064), (5020, 16000), (6275, 12800), (6400, 12550), (8000, 10040), (8032, 10000)]