21145887

素因数分解:

$3^3\times 7^1\times {\mathrm{53}}^1\times {\mathrm{2111}}^1$

素因数の和:2180

約数の個数: 32

約数和(自身を含む): 36495360

約数和(自身を除く): 15349473

約数列:

[1, 3, 7, 9, 21, 27, 53, 63, 159, 189, 371, 477, 1113, 1431, 2111, 3339, 6333, 10017, 14777, 18999, 44331, 56997, 111883, 132993, 335649, 398979, 783181, 1006947, 2349543, 3020841, 7048629, 21145887]

約数ペア:

[(1, 21145887), (3, 7048629), (7, 3020841), (9, 2349543), (21, 1006947), (27, 783181), (53, 398979), (63, 335649), (159, 132993), (189, 111883), (371, 56997), (477, 44331), (1113, 18999), (1431, 14777), (2111, 10017), (3339, 6333)]