21173481

素因数分解:

$3^4\times 7^1\times {\mathrm{107}}^1\times {\mathrm{349}}^1$

素因数の和:475

約数の個数: 40

約数和(自身を含む): 36590400

約数和(自身を除く): 15416919

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 107, 189, 321, 349, 567, 749, 963, 1047, 2247, 2443, 2889, 3141, 6741, 7329, 8667, 9423, 20223, 21987, 28269, 37343, 60669, 65961, 112029, 197883, 261401, 336087, 784203, 1008261, 2352609, 3024783, 7057827, 21173481]

約数ペア:

[(1, 21173481), (3, 7057827), (7, 3024783), (9, 2352609), (21, 1008261), (27, 784203), (63, 336087), (81, 261401), (107, 197883), (189, 112029), (321, 65961), (349, 60669), (567, 37343), (749, 28269), (963, 21987), (1047, 20223), (2247, 9423), (2443, 8667), (2889, 7329), (3141, 6741)]