21647795

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{8123}}^1$

素因数の和:8182

約数の個数: 16

約数和(自身を含む): 28661472

約数和(自身を除く): 7013677

約数列:

[1, 5, 13, 41, 65, 205, 533, 2665, 8123, 40615, 105599, 333043, 527995, 1665215, 4329559, 21647795]

約数ペア:

[(1, 21647795), (5, 4329559), (13, 1665215), (41, 527995), (65, 333043), (205, 105599), (533, 40615), (2665, 8123)]