20464820

素因数分解:

$2^2\times 5^1\times {\mathrm{73}}^1\times {\mathrm{107}}^1\times {\mathrm{131}}^1$

素因数の和:320

約数の個数: 48

約数和(自身を含む): 44307648

約数和(自身を除く): 23842828

約数列:

[1, 2, 4, 5, 10, 20, 73, 107, 131, 146, 214, 262, 292, 365, 428, 524, 535, 655, 730, 1070, 1310, 1460, 2140, 2620, 7811, 9563, 14017, 15622, 19126, 28034, 31244, 38252, 39055, 47815, 56068, 70085, 78110, 95630, 140170, 156220, 191260, 280340, 1023241, 2046482, 4092964, 5116205, 10232410, 20464820]

約数ペア:

[(1, 20464820), (2, 10232410), (4, 5116205), (5, 4092964), (10, 2046482), (20, 1023241), (73, 280340), (107, 191260), (131, 156220), (146, 140170), (214, 95630), (262, 78110), (292, 70085), (365, 56068), (428, 47815), (524, 39055), (535, 38252), (655, 31244), (730, 28034), (1070, 19126), (1310, 15622), (1460, 14017), (2140, 9563), (2620, 7811)]