19819855

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{89}}^1\times {\mathrm{4049}}^1$

素因数の和:4154

約数の個数: 16

約数和(自身を含む): 26244000

約数和(自身を除く): 6424145

約数列:

[1, 5, 11, 55, 89, 445, 979, 4049, 4895, 20245, 44539, 222695, 360361, 1801805, 3963971, 19819855]

約数ペア:

[(1, 19819855), (5, 3963971), (11, 1801805), (55, 360361), (89, 222695), (445, 44539), (979, 20245), (4049, 4895)]