19971235

素因数分解:

$5^1\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{557}}^1$

素因数の和:734

約数の個数: 16

約数和(自身を含む): 24587712

約数和(自身を除く): 4616477

約数列:

[1, 5, 71, 101, 355, 505, 557, 2785, 7171, 35855, 39547, 56257, 197735, 281285, 3994247, 19971235]

約数ペア:

[(1, 19971235), (5, 3994247), (71, 281285), (101, 197735), (355, 56257), (505, 39547), (557, 35855), (2785, 7171)]