128230720

素因数分解:

$2^6\times 5^1\times {\mathrm{400721}}^1$

素因数の和:400738

約数の個数: 28

約数和(自身を含む): 305350164

約数和(自身を除く): 177119444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 400721, 801442, 1602884, 2003605, 3205768, 4007210, 6411536, 8014420, 12823072, 16028840, 25646144, 32057680, 64115360, 128230720]

約数ペア:

[(1, 128230720), (2, 64115360), (4, 32057680), (5, 25646144), (8, 16028840), (10, 12823072), (16, 8014420), (20, 6411536), (32, 4007210), (40, 3205768), (64, 2003605), (80, 1602884), (160, 801442), (320, 400721)]