20851204

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{643}}^1$

素因数の和:736

約数の個数: 36

約数和(自身を含む): 40770352

約数和(自身を除く): 19919148

約数列:

[1, 2, 4, 11, 22, 44, 67, 121, 134, 242, 268, 484, 643, 737, 1286, 1474, 2572, 2948, 7073, 8107, 14146, 16214, 28292, 32428, 43081, 77803, 86162, 155606, 172324, 311212, 473891, 947782, 1895564, 5212801, 10425602, 20851204]

約数ペア:

[(1, 20851204), (2, 10425602), (4, 5212801), (11, 1895564), (22, 947782), (44, 473891), (67, 311212), (121, 172324), (134, 155606), (242, 86162), (268, 77803), (484, 43081), (643, 32428), (737, 28292), (1286, 16214), (1474, 14146), (2572, 8107), (2948, 7073)]