19571990

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{21991}}^1$

素因数の和:22087

約数の個数: 16

約数和(自身を含む): 35627040

約数和(自身を除く): 16055050

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 21991, 43982, 109955, 219910, 1957199, 3914398, 9785995, 19571990]

約数ペア:

[(1, 19571990), (2, 9785995), (5, 3914398), (10, 1957199), (89, 219910), (178, 109955), (445, 43982), (890, 21991)]