21681885

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{85027}}^1$

素因数の和:85052

約数の個数: 16

約数和(自身を含む): 36732096

約数和(自身を除く): 15050211

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 85027, 255081, 425135, 1275405, 1445459, 4336377, 7227295, 21681885]

約数ペア:

[(1, 21681885), (3, 7227295), (5, 4336377), (15, 1445459), (17, 1275405), (51, 425135), (85, 255081), (255, 85027)]