19912420

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{90511}}^1$

素因数の和:90531

約数の個数: 24

約数和(自身を含む): 45618048

約数和(自身を除く): 25705628

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 90511, 181022, 362044, 452555, 905110, 995621, 1810220, 1991242, 3982484, 4978105, 9956210, 19912420]

約数ペア:

[(1, 19912420), (2, 9956210), (4, 4978105), (5, 3982484), (10, 1991242), (11, 1810220), (20, 995621), (22, 905110), (44, 452555), (55, 362044), (110, 181022), (220, 90511)]