19401981

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{557}}^1\times {\mathrm{683}}^1$

素因数の和:1260

約数の個数: 16

約数和(自身を含む): 27480384

約数和(自身を除く): 8078403

約数列:

[1, 3, 17, 51, 557, 683, 1671, 2049, 9469, 11611, 28407, 34833, 380431, 1141293, 6467327, 19401981]

約数ペア:

[(1, 19401981), (3, 6467327), (17, 1141293), (51, 380431), (557, 34833), (683, 28407), (1671, 11611), (2049, 9469)]