21069328

素因数分解:

$2^4\times 7^1\times {\mathrm{19}}^1\times {\mathrm{9901}}^1$

素因数の和:9935

約数の個数: 40

約数和(自身を含む): 49113920

約数和(自身を除く): 28044592

約数列:

[1, 2, 4, 7, 8, 14, 16, 19, 28, 38, 56, 76, 112, 133, 152, 266, 304, 532, 1064, 2128, 9901, 19802, 39604, 69307, 79208, 138614, 158416, 188119, 277228, 376238, 554456, 752476, 1108912, 1316833, 1504952, 2633666, 3009904, 5267332, 10534664, 21069328]

約数ペア:

[(1, 21069328), (2, 10534664), (4, 5267332), (7, 3009904), (8, 2633666), (14, 1504952), (16, 1316833), (19, 1108912), (28, 752476), (38, 554456), (56, 376238), (76, 277228), (112, 188119), (133, 158416), (152, 138614), (266, 79208), (304, 69307), (532, 39604), (1064, 19802), (2128, 9901)]