1997905

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{4391}}^1$

素因数の和:4416

約数の個数: 16

約数和(自身を含む): 2951424

約数和(自身を除く): 953519

約数列:

[1, 5, 7, 13, 35, 65, 91, 455, 4391, 21955, 30737, 57083, 153685, 285415, 399581, 1997905]

約数ペア:

[(1, 1997905), (5, 399581), (7, 285415), (13, 153685), (35, 57083), (65, 30737), (91, 21955), (455, 4391)]