20785570

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{281}}^1\times {\mathrm{569}}^1$

素因数の和:870

約数の個数: 32

約数和(自身を含む): 40506480

約数和(自身を除く): 19720910

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 281, 562, 569, 1138, 1405, 2810, 2845, 3653, 5690, 7306, 7397, 14794, 18265, 36530, 36985, 73970, 159889, 319778, 799445, 1598890, 2078557, 4157114, 10392785, 20785570]

約数ペア:

[(1, 20785570), (2, 10392785), (5, 4157114), (10, 2078557), (13, 1598890), (26, 799445), (65, 319778), (130, 159889), (281, 73970), (562, 36985), (569, 36530), (1138, 18265), (1405, 14794), (2810, 7397), (2845, 7306), (3653, 5690)]