128130880

素因数分解:

$2^6\times 5^1\times {\mathrm{400409}}^1$

素因数の和:400426

約数の個数: 28

約数和(自身を含む): 305112420

約数和(自身を除く): 176981540

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 400409, 800818, 1601636, 2002045, 3203272, 4004090, 6406544, 8008180, 12813088, 16016360, 25626176, 32032720, 64065440, 128130880]

約数ペア:

[(1, 128130880), (2, 64065440), (4, 32032720), (5, 25626176), (8, 16016360), (10, 12813088), (16, 8008180), (20, 6406544), (32, 4004090), (40, 3203272), (64, 2002045), (80, 1601636), (160, 800818), (320, 400409)]