21387874

素因数分解:

$2^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1\times {\mathrm{827}}^1$

素因数の和:1089

約数の個数: 16

約数和(自身を含む): 32768928

約数和(自身を除く): 11381054

約数列:

[1, 2, 67, 134, 193, 386, 827, 1654, 12931, 25862, 55409, 110818, 159611, 319222, 10693937, 21387874]

約数ペア:

[(1, 21387874), (2, 10693937), (67, 319222), (134, 159611), (193, 110818), (386, 55409), (827, 25862), (1654, 12931)]