21159201

素因数分解:

$3^1\times 7^1\times {\mathrm{643}}^1\times {\mathrm{1567}}^1$

素因数の和:2220

約数の個数: 16

約数和(自身を含む): 32313344

約数和(自身を除く): 11154143

約数列:

[1, 3, 7, 21, 643, 1567, 1929, 4501, 4701, 10969, 13503, 32907, 1007581, 3022743, 7053067, 21159201]

約数ペア:

[(1, 21159201), (3, 7053067), (7, 3022743), (21, 1007581), (643, 32907), (1567, 13503), (1929, 10969), (4501, 4701)]