21031947

素因数分解:

$3^3\times {\mathrm{37}}^2\times {\mathrm{569}}^1$

素因数の和:652

約数の個数: 24

約数和(自身を含む): 32079600

約数和(自身を除く): 11047653

約数列:

[1, 3, 9, 27, 37, 111, 333, 569, 999, 1369, 1707, 4107, 5121, 12321, 15363, 21053, 36963, 63159, 189477, 568431, 778961, 2336883, 7010649, 21031947]

約数ペア:

[(1, 21031947), (3, 7010649), (9, 2336883), (27, 778961), (37, 568431), (111, 189477), (333, 63159), (569, 36963), (999, 21053), (1369, 15363), (1707, 12321), (4107, 5121)]