18891994

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{239}}^1\times {\mathrm{3593}}^1$

素因数の和:3845

約数の個数: 16

約数和(自身を含む): 31052160

約数和(自身を除く): 12160166

約数列:

[1, 2, 11, 22, 239, 478, 2629, 3593, 5258, 7186, 39523, 79046, 858727, 1717454, 9445997, 18891994]

約数ペア:

[(1, 18891994), (2, 9445997), (11, 1717454), (22, 858727), (239, 79046), (478, 39523), (2629, 7186), (3593, 5258)]