78978040

素因数分解:

$2^3\times 5^1\times {\mathrm{443}}^1\times {\mathrm{4457}}^1$

素因数の和:4911

約数の個数: 32

約数和(自身を含む): 178141680

約数和(自身を除く): 99163640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 443, 886, 1772, 2215, 3544, 4430, 4457, 8860, 8914, 17720, 17828, 22285, 35656, 44570, 89140, 178280, 1974451, 3948902, 7897804, 9872255, 15795608, 19744510, 39489020, 78978040]

約数ペア:

[(1, 78978040), (2, 39489020), (4, 19744510), (5, 15795608), (8, 9872255), (10, 7897804), (20, 3948902), (40, 1974451), (443, 178280), (886, 89140), (1772, 44570), (2215, 35656), (3544, 22285), (4430, 17828), (4457, 17720), (8860, 8914)]