81918820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{99901}}^1$

素因数の和:99951

約数の個数: 24

約数和(自身を含む): 176227128

約数和(自身を除く): 94308308

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99901, 199802, 399604, 499505, 999010, 1998020, 4095941, 8191882, 16383764, 20479705, 40959410, 81918820]

約数ペア:

[(1, 81918820), (2, 40959410), (4, 20479705), (5, 16383764), (10, 8191882), (20, 4095941), (41, 1998020), (82, 999010), (164, 499505), (205, 399604), (410, 199802), (820, 99901)]