21287590

素因数分解:

$2^1\times 5^1\times {\mathrm{1277}}^1\times {\mathrm{1667}}^1$

素因数の和:2951

約数の個数: 16

約数和(自身を含む): 38370672

約数和(自身を除く): 17083082

約数列:

[1, 2, 5, 10, 1277, 1667, 2554, 3334, 6385, 8335, 12770, 16670, 2128759, 4257518, 10643795, 21287590]

約数ペア:

[(1, 21287590), (2, 10643795), (5, 4257518), (10, 2128759), (1277, 16670), (1667, 12770), (2554, 8335), (3334, 6385)]