20171991

素因数分解:

$3^1\times 7^1\times {\mathrm{613}}^1\times {\mathrm{1567}}^1$

素因数の和:2190

約数の個数: 16

約数和(自身を含む): 30808064

約数和(自身を除く): 10636073

約数列:

[1, 3, 7, 21, 613, 1567, 1839, 4291, 4701, 10969, 12873, 32907, 960571, 2881713, 6723997, 20171991]

約数ペア:

[(1, 20171991), (3, 6723997), (7, 2881713), (21, 960571), (613, 32907), (1567, 12873), (1839, 10969), (4291, 4701)]