81642560

素因数分解:

$2^6\times 5^1\times {\mathrm{255133}}^1$

素因数の和:255150

約数の個数: 28

約数和(自身を含む): 194412108

約数和(自身を除く): 112769548

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 255133, 510266, 1020532, 1275665, 2041064, 2551330, 4082128, 5102660, 8164256, 10205320, 16328512, 20410640, 40821280, 81642560]

約数ペア:

[(1, 81642560), (2, 40821280), (4, 20410640), (5, 16328512), (8, 10205320), (10, 8164256), (16, 5102660), (20, 4082128), (32, 2551330), (40, 2041064), (64, 1275665), (80, 1020532), (160, 510266), (320, 255133)]