19881987

素因数分解:

$3^1\times {\mathrm{37}}^2\times {\mathrm{47}}^1\times {\mathrm{103}}^1$

素因数の和:227

約数の個数: 24

約数和(自身を含む): 28094976

約数和(自身を除く): 8212989

約数列:

[1, 3, 37, 47, 103, 111, 141, 309, 1369, 1739, 3811, 4107, 4841, 5217, 11433, 14523, 64343, 141007, 179117, 193029, 423021, 537351, 6627329, 19881987]

約数ペア:

[(1, 19881987), (3, 6627329), (37, 537351), (47, 423021), (103, 193029), (111, 179117), (141, 141007), (309, 64343), (1369, 14523), (1739, 11433), (3811, 5217), (4107, 4841)]