20198995

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{2389}}^1$

素因数の和:2502

約数の個数: 16

約数和(自身を含む): 25812000

約数和(自身を除く): 5613005

約数列:

[1, 5, 19, 89, 95, 445, 1691, 2389, 8455, 11945, 45391, 212621, 226955, 1063105, 4039799, 20198995]

約数ペア:

[(1, 20198995), (5, 4039799), (19, 1063105), (89, 226955), (95, 212621), (445, 45391), (1691, 11945), (2389, 8455)]