21145509

素因数分解:

$3^3\times 7^2\times {\mathrm{11}}^1\times {\mathrm{1453}}^1$

素因数の和:1487

約数の個数: 48

約数和(自身を含む): 39781440

約数和(自身を除く): 18635931

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 49, 63, 77, 99, 147, 189, 231, 297, 441, 539, 693, 1323, 1453, 1617, 2079, 4359, 4851, 10171, 13077, 14553, 15983, 30513, 39231, 47949, 71197, 91539, 111881, 143847, 213591, 274617, 335643, 431541, 640773, 783167, 1006929, 1922319, 2349501, 3020787, 7048503, 21145509]

約数ペア:

[(1, 21145509), (3, 7048503), (7, 3020787), (9, 2349501), (11, 1922319), (21, 1006929), (27, 783167), (33, 640773), (49, 431541), (63, 335643), (77, 274617), (99, 213591), (147, 143847), (189, 111881), (231, 91539), (297, 71197), (441, 47949), (539, 39231), (693, 30513), (1323, 15983), (1453, 14553), (1617, 13077), (2079, 10171), (4359, 4851)]