21611219

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{181}}^1\times {\mathrm{461}}^1$

素因数の和:686

約数の個数: 16

約数和(自身を含む): 25561536

約数和(自身を除く): 3950317

約数列:

[1, 7, 37, 181, 259, 461, 1267, 3227, 6697, 17057, 46879, 83441, 119399, 584087, 3087317, 21611219]

約数ペア:

[(1, 21611219), (7, 3087317), (37, 584087), (181, 119399), (259, 83441), (461, 46879), (1267, 17057), (3227, 6697)]