21054879

素因数分解:

$3^2\times {\mathrm{73}}^2\times {\mathrm{439}}^1$

素因数の和:591

約数の個数: 18

約数和(自身を含む): 30905160

約数和(自身を除く): 9850281

約数列:

[1, 3, 9, 73, 219, 439, 657, 1317, 3951, 5329, 15987, 32047, 47961, 96141, 288423, 2339431, 7018293, 21054879]

約数ペア:

[(1, 21054879), (3, 7018293), (9, 2339431), (73, 288423), (219, 96141), (439, 47961), (657, 32047), (1317, 15987), (3951, 5329)]