21698761

素因数分解:

$7^1\times {\mathrm{37}}^1\times {\mathrm{199}}^1\times {\mathrm{421}}^1$

素因数の和:664

約数の個数: 16

約数和(自身を含む): 25657600

約数和(自身を除く): 3958839

約数列:

[1, 7, 37, 199, 259, 421, 1393, 2947, 7363, 15577, 51541, 83779, 109039, 586453, 3099823, 21698761]

約数ペア:

[(1, 21698761), (7, 3099823), (37, 586453), (199, 109039), (259, 83779), (421, 51541), (1393, 15577), (2947, 7363)]