81640960

素因数分解:

$2^9\times 5^1\times {\mathrm{31891}}^1$

素因数の和:31914

約数の個数: 40

約数和(自身を含む): 195753096

約数和(自身を除く): 114112136

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 256, 320, 512, 640, 1280, 2560, 31891, 63782, 127564, 159455, 255128, 318910, 510256, 637820, 1020512, 1275640, 2041024, 2551280, 4082048, 5102560, 8164096, 10205120, 16328192, 20410240, 40820480, 81640960]

約数ペア:

[(1, 81640960), (2, 40820480), (4, 20410240), (5, 16328192), (8, 10205120), (10, 8164096), (16, 5102560), (20, 4082048), (32, 2551280), (40, 2041024), (64, 1275640), (80, 1020512), (128, 637820), (160, 510256), (256, 318910), (320, 255128), (512, 159455), (640, 127564), (1280, 63782), (2560, 31891)]