21899995

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19819}}^1$

素因数の和:19854

約数の個数: 16

約数和(自身を含む): 29967840

約数和(自身を除く): 8067845

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19819, 99095, 257647, 336923, 1288235, 1684615, 4379999, 21899995]

約数ペア:

[(1, 21899995), (5, 4379999), (13, 1684615), (17, 1288235), (65, 336923), (85, 257647), (221, 99095), (1105, 19819)]