21889287

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{11981}}^1$

素因数の和:12023

約数の個数: 24

約数和(自身を含む): 37383840

約数和(自身を除く): 15494553

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 11981, 35943, 83867, 107829, 251601, 347449, 754803, 1042347, 2432143, 3127041, 7296429, 21889287]

約数ペア:

[(1, 21889287), (3, 7296429), (7, 3127041), (9, 2432143), (21, 1042347), (29, 754803), (63, 347449), (87, 251601), (203, 107829), (261, 83867), (609, 35943), (1827, 11981)]