21085533

素因数分解:

$3^2\times 7^2\times {\mathrm{137}}^1\times {\mathrm{349}}^1$

素因数の和:506

約数の個数: 36

約数和(自身を含む): 35790300

約数和(自身を除く): 14704767

約数列:

[1, 3, 7, 9, 21, 49, 63, 137, 147, 349, 411, 441, 959, 1047, 1233, 2443, 2877, 3141, 6713, 7329, 8631, 17101, 20139, 21987, 47813, 51303, 60417, 143439, 153909, 334691, 430317, 1004073, 2342837, 3012219, 7028511, 21085533]

約数ペア:

[(1, 21085533), (3, 7028511), (7, 3012219), (9, 2342837), (21, 1004073), (49, 430317), (63, 334691), (137, 153909), (147, 143439), (349, 60417), (411, 51303), (441, 47813), (959, 21987), (1047, 20139), (1233, 17101), (2443, 8631), (2877, 7329), (3141, 6713)]