21963921

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{14731}}^1$

素因数の和:14812

約数の個数: 16

約数和(自身を含む): 33942528

約数和(自身を除く): 11978607

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 14731, 44193, 103117, 309351, 1045901, 3137703, 7321307, 21963921]

約数ペア:

[(1, 21963921), (3, 7321307), (7, 3137703), (21, 1045901), (71, 309351), (213, 103117), (497, 44193), (1491, 14731)]