21072770

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1\times {\mathrm{499}}^1$

素因数の和:650

約数の個数: 32

約数和(自身を含む): 39312000

約数和(自身を除く): 18239230

約数列:

[1, 2, 5, 10, 41, 82, 103, 205, 206, 410, 499, 515, 998, 1030, 2495, 4223, 4990, 8446, 20459, 21115, 40918, 42230, 51397, 102295, 102794, 204590, 256985, 513970, 2107277, 4214554, 10536385, 21072770]

約数ペア:

[(1, 21072770), (2, 10536385), (5, 4214554), (10, 2107277), (41, 513970), (82, 256985), (103, 204590), (205, 102794), (206, 102295), (410, 51397), (499, 42230), (515, 40918), (998, 21115), (1030, 20459), (2495, 8446), (4223, 4990)]