20509911

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{277}}^1\times {\mathrm{433}}^1$

素因数の和:735

約数の個数: 24

約数和(自身を含む): 31369520

約数和(自身を除く): 10859609

約数列:

[1, 3, 9, 19, 57, 171, 277, 433, 831, 1299, 2493, 3897, 5263, 8227, 15789, 24681, 47367, 74043, 119941, 359823, 1079469, 2278879, 6836637, 20509911]

約数ペア:

[(1, 20509911), (3, 6836637), (9, 2278879), (19, 1079469), (57, 359823), (171, 119941), (277, 74043), (433, 47367), (831, 24681), (1299, 15789), (2493, 8227), (3897, 5263)]