19900945

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{71}}^1\times {\mathrm{919}}^1$

素因数の和:1056

約数の個数: 16

約数和(自身を含む): 24641280

約数和(自身を除く): 4740335

約数列:

[1, 5, 61, 71, 305, 355, 919, 4331, 4595, 21655, 56059, 65249, 280295, 326245, 3980189, 19900945]

約数ペア:

[(1, 19900945), (5, 3980189), (61, 326245), (71, 280295), (305, 65249), (355, 56059), (919, 21655), (4331, 4595)]