81120020

素因数分解:

$2^2\times 5^1\times {\mathrm{947}}^1\times {\mathrm{4283}}^1$

素因数の和:5239

約数の個数: 24

約数和(自身を含む): 170571744

約数和(自身を除く): 89451724

約数列:

[1, 2, 4, 5, 10, 20, 947, 1894, 3788, 4283, 4735, 8566, 9470, 17132, 18940, 21415, 42830, 85660, 4056001, 8112002, 16224004, 20280005, 40560010, 81120020]

約数ペア:

[(1, 81120020), (2, 40560010), (4, 20280005), (5, 16224004), (10, 8112002), (20, 4056001), (947, 85660), (1894, 42830), (3788, 21415), (4283, 18940), (4735, 17132), (8566, 9470)]