21131888

素因数分解:

$2^4\times {\mathrm{887}}^1\times {\mathrm{1489}}^1$

素因数の和:2384

約数の個数: 20

約数和(自身を含む): 41016720

約数和(自身を除く): 19884832

約数列:

[1, 2, 4, 8, 16, 887, 1489, 1774, 2978, 3548, 5956, 7096, 11912, 14192, 23824, 1320743, 2641486, 5282972, 10565944, 21131888]

約数ペア:

[(1, 21131888), (2, 10565944), (4, 5282972), (8, 2641486), (16, 1320743), (887, 23824), (1489, 14192), (1774, 11912), (2978, 7096), (3548, 5956)]