19979035

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1\times {\mathrm{821}}^1$

素因数の和:1014

約数の個数: 16

約数和(自身を含む): 24936192

約数和(自身を除く): 4957157

約数列:

[1, 5, 31, 155, 157, 785, 821, 4105, 4867, 24335, 25451, 127255, 128897, 644485, 3995807, 19979035]

約数ペア:

[(1, 19979035), (5, 3995807), (31, 644485), (155, 128897), (157, 127255), (785, 25451), (821, 24335), (4105, 4867)]