21620157

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{163}}^1\times {\mathrm{179}}^1$

素因数の和:377

約数の個数: 32

約数和(自身を含む): 33062400

約数和(自身を除く): 11442243

約数列:

[1, 3, 13, 19, 39, 57, 163, 179, 247, 489, 537, 741, 2119, 2327, 3097, 3401, 6357, 6981, 9291, 10203, 29177, 40261, 44213, 87531, 120783, 132639, 379301, 554363, 1137903, 1663089, 7206719, 21620157]

約数ペア:

[(1, 21620157), (3, 7206719), (13, 1663089), (19, 1137903), (39, 554363), (57, 379301), (163, 132639), (179, 120783), (247, 87531), (489, 44213), (537, 40261), (741, 29177), (2119, 10203), (2327, 9291), (3097, 6981), (3401, 6357)]