19801081990

素因数分解:

$2^1\times 5^1\times {\mathrm{19}}^1\times {\mathrm{104216221}}^1$

素因数の和:104216247

約数の個数: 16

約数和(自身を含む): 37517839920

約数和(自身を除く): 17716757930

約数列:

[1, 2, 5, 10, 19, 38, 95, 190, 104216221, 208432442, 521081105, 1042162210, 1980108199, 3960216398, 9900540995, 19801081990]

約数ペア:

[(1, 19801081990), (2, 9900540995), (5, 3960216398), (10, 1980108199), (19, 1042162210), (38, 521081105), (95, 208432442), (190, 104216221)]