19989845

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{1549}}^1$

素因数の和:1672

約数の個数: 16

約数和(自身を含む): 25110000

約数和(自身を除く): 5120155

約数列:

[1, 5, 29, 89, 145, 445, 1549, 2581, 7745, 12905, 44921, 137861, 224605, 689305, 3997969, 19989845]

約数ペア:

[(1, 19989845), (5, 3997969), (29, 689305), (89, 224605), (145, 137861), (445, 44921), (1549, 12905), (2581, 7745)]