20515540

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{103}}^1\times {\mathrm{433}}^1$

素因数の和:568

約数の個数: 48

約数和(自身を含む): 45497088

約数和(自身を除く): 24981548

約数列:

[1, 2, 4, 5, 10, 20, 23, 46, 92, 103, 115, 206, 230, 412, 433, 460, 515, 866, 1030, 1732, 2060, 2165, 2369, 4330, 4738, 8660, 9476, 9959, 11845, 19918, 23690, 39836, 44599, 47380, 49795, 89198, 99590, 178396, 199180, 222995, 445990, 891980, 1025777, 2051554, 4103108, 5128885, 10257770, 20515540]

約数ペア:

[(1, 20515540), (2, 10257770), (4, 5128885), (5, 4103108), (10, 2051554), (20, 1025777), (23, 891980), (46, 445990), (92, 222995), (103, 199180), (115, 178396), (206, 99590), (230, 89198), (412, 49795), (433, 47380), (460, 44599), (515, 39836), (866, 23690), (1030, 19918), (1732, 11845), (2060, 9959), (2165, 9476), (2369, 8660), (4330, 4738)]