21765457

素因数分解:

$7^2\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{53}}^1$

素因数の和:130

約数の個数: 36

約数和(自身を含む): 28348380

約数和(自身を除く): 6582923

約数列:

[1, 7, 17, 29, 49, 53, 119, 203, 289, 371, 493, 833, 901, 1421, 1537, 2023, 2597, 3451, 6307, 8381, 10759, 14161, 15317, 24157, 26129, 44149, 58667, 75313, 107219, 182903, 410669, 444193, 750533, 1280321, 3109351, 21765457]

約数ペア:

[(1, 21765457), (7, 3109351), (17, 1280321), (29, 750533), (49, 444193), (53, 410669), (119, 182903), (203, 107219), (289, 75313), (371, 58667), (493, 44149), (833, 26129), (901, 24157), (1421, 15317), (1537, 14161), (2023, 10759), (2597, 8381), (3451, 6307)]