21871017

素因数分解:

$3^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{11971}}^1$

素因数の和:12013

約数の個数: 24

約数和(自身を含む): 37352640

約数和(自身を除く): 15481623

約数列:

[1, 3, 7, 9, 21, 29, 63, 87, 203, 261, 609, 1827, 11971, 35913, 83797, 107739, 251391, 347159, 754173, 1041477, 2430113, 3124431, 7290339, 21871017]

約数ペア:

[(1, 21871017), (3, 7290339), (7, 3124431), (9, 2430113), (21, 1041477), (29, 754173), (63, 347159), (87, 251391), (203, 107739), (261, 83797), (609, 35913), (1827, 11971)]