17999901

素因数分解:

$3^4\times {\mathrm{359}}^1\times {\mathrm{619}}^1$

素因数の和:990

約数の個数: 20

約数和(自身を含む): 27007200

約数和(自身を除く): 9007299

約数列:

[1, 3, 9, 27, 81, 359, 619, 1077, 1857, 3231, 5571, 9693, 16713, 29079, 50139, 222221, 666663, 1999989, 5999967, 17999901]

約数ペア:

[(1, 17999901), (3, 5999967), (9, 1999989), (27, 666663), (81, 222221), (359, 50139), (619, 29079), (1077, 16713), (1857, 9693), (3231, 5571)]