21080965

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{71}}^1\times {\mathrm{1381}}^1$

素因数の和:1500

約数の個数: 16

約数和(自身を含む): 26269056

約数和(自身を除く): 5188091

約数列:

[1, 5, 43, 71, 215, 355, 1381, 3053, 6905, 15265, 59383, 98051, 296915, 490255, 4216193, 21080965]

約数ペア:

[(1, 21080965), (5, 4216193), (43, 490255), (71, 296915), (215, 98051), (355, 59383), (1381, 15265), (3053, 6905)]