21025821

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{3853}}^1$

素因数の和:3980

約数の個数: 16

約数和(自身を含む): 29968704

約数和(自身を除く): 8942883

約数列:

[1, 3, 17, 51, 107, 321, 1819, 3853, 5457, 11559, 65501, 196503, 412271, 1236813, 7008607, 21025821]

約数ペア:

[(1, 21025821), (3, 7008607), (17, 1236813), (51, 412271), (107, 196503), (321, 65501), (1819, 11559), (3853, 5457)]