81544640

素因数分解:

$2^6\times 5^1\times {\mathrm{254827}}^1$

素因数の和:254844

約数の個数: 28

約数和(自身を含む): 194178936

約数和(自身を除く): 112634296

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 254827, 509654, 1019308, 1274135, 2038616, 2548270, 4077232, 5096540, 8154464, 10193080, 16308928, 20386160, 40772320, 81544640]

約数ペア:

[(1, 81544640), (2, 40772320), (4, 20386160), (5, 16308928), (8, 10193080), (10, 8154464), (16, 5096540), (20, 4077232), (32, 2548270), (40, 2038616), (64, 1274135), (80, 1019308), (160, 509654), (320, 254827)]