81434240

素因数分解:

$2^7\times 5^1\times {\mathrm{127241}}^1$

素因数の和:127260

約数の個数: 32

約数和(自身を含む): 194680260

約数和(自身を除く): 113246020

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 640, 127241, 254482, 508964, 636205, 1017928, 1272410, 2035856, 2544820, 4071712, 5089640, 8143424, 10179280, 16286848, 20358560, 40717120, 81434240]

約数ペア:

[(1, 81434240), (2, 40717120), (4, 20358560), (5, 16286848), (8, 10179280), (10, 8143424), (16, 5089640), (20, 4071712), (32, 2544820), (40, 2035856), (64, 1272410), (80, 1017928), (128, 636205), (160, 508964), (320, 254482), (640, 127241)]