81605120

素因数分解:

$2^9\times 5^1\times {\mathrm{127}}^1\times {\mathrm{251}}^1$

素因数の和:401

約数の個数: 80

約数和(自身を含む): 197987328

約数和(自身を除く): 116382208

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 127, 128, 160, 251, 254, 256, 320, 502, 508, 512, 635, 640, 1004, 1016, 1255, 1270, 1280, 2008, 2032, 2510, 2540, 2560, 4016, 4064, 5020, 5080, 8032, 8128, 10040, 10160, 16064, 16256, 20080, 20320, 31877, 32128, 32512, 40160, 40640, 63754, 64256, 65024, 80320, 81280, 127508, 128512, 159385, 160640, 162560, 255016, 318770, 321280, 325120, 510032, 637540, 642560, 1020064, 1275080, 2040128, 2550160, 4080256, 5100320, 8160512, 10200640, 16321024, 20401280, 40802560, 81605120]

約数ペア:

[(1, 81605120), (2, 40802560), (4, 20401280), (5, 16321024), (8, 10200640), (10, 8160512), (16, 5100320), (20, 4080256), (32, 2550160), (40, 2040128), (64, 1275080), (80, 1020064), (127, 642560), (128, 637540), (160, 510032), (251, 325120), (254, 321280), (256, 318770), (320, 255016), (502, 162560), (508, 160640), (512, 159385), (635, 128512), (640, 127508), (1004, 81280), (1016, 80320), (1255, 65024), (1270, 64256), (1280, 63754), (2008, 40640), (2032, 40160), (2510, 32512), (2540, 32128), (2560, 31877), (4016, 20320), (4064, 20080), (5020, 16256), (5080, 16064), (8032, 10160), (8128, 10040)]