20387955

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{281}}^1\times {\mathrm{691}}^1$

素因数の和:987

約数の個数: 32

約数和(自身を含む): 37467648

約数和(自身を除く): 17079693

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 281, 691, 843, 1405, 1967, 2073, 3455, 4215, 4837, 5901, 9835, 10365, 14511, 24185, 29505, 72555, 194171, 582513, 970855, 1359197, 2912565, 4077591, 6795985, 20387955]

約数ペア:

[(1, 20387955), (3, 6795985), (5, 4077591), (7, 2912565), (15, 1359197), (21, 970855), (35, 582513), (105, 194171), (281, 72555), (691, 29505), (843, 24185), (1405, 14511), (1967, 10365), (2073, 9835), (3455, 5901), (4215, 4837)]