18905789

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{389}}^1$

素因数の和:580

約数の個数: 16

約数和(自身を含む): 22239360

約数和(自身を除く): 3333571

約数列:

[1, 7, 53, 131, 371, 389, 917, 2723, 6943, 20617, 48601, 50959, 144319, 356713, 2700827, 18905789]

約数ペア:

[(1, 18905789), (7, 2700827), (53, 356713), (131, 144319), (371, 50959), (389, 48601), (917, 20617), (2723, 6943)]