21509278

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67}}^1\times {\mathrm{997}}^1$

素因数の和:1096

約数の個数: 32

約数和(自身を含む): 39089664

約数和(自身を除く): 17580386

約数列:

[1, 2, 7, 14, 23, 46, 67, 134, 161, 322, 469, 938, 997, 1541, 1994, 3082, 6979, 10787, 13958, 21574, 22931, 45862, 66799, 133598, 160517, 321034, 467593, 935186, 1536377, 3072754, 10754639, 21509278]

約数ペア:

[(1, 21509278), (2, 10754639), (7, 3072754), (14, 1536377), (23, 935186), (46, 467593), (67, 321034), (134, 160517), (161, 133598), (322, 66799), (469, 45862), (938, 22931), (997, 21574), (1541, 13958), (1994, 10787), (3082, 6979)]