21556431

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{9697}}^1$

素因数の和:9735

約数の個数: 24

約数和(自身を含む): 35300720

約数和(自身を除く): 13744289

約数列:

[1, 3, 9, 13, 19, 39, 57, 117, 171, 247, 741, 2223, 9697, 29091, 87273, 126061, 184243, 378183, 552729, 1134549, 1658187, 2395159, 7185477, 21556431]

約数ペア:

[(1, 21556431), (3, 7185477), (9, 2395159), (13, 1658187), (19, 1134549), (39, 552729), (57, 378183), (117, 184243), (171, 126061), (247, 87273), (741, 29091), (2223, 9697)]