21689906

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{1117}}^1$

素因数の和:1218

約数の個数: 32

約数和(自身を含む): 39711360

約数和(自身を除く): 18021454

約数列:

[1, 2, 7, 14, 19, 38, 73, 133, 146, 266, 511, 1022, 1117, 1387, 2234, 2774, 7819, 9709, 15638, 19418, 21223, 42446, 81541, 148561, 163082, 297122, 570787, 1141574, 1549279, 3098558, 10844953, 21689906]

約数ペア:

[(1, 21689906), (2, 10844953), (7, 3098558), (14, 1549279), (19, 1141574), (38, 570787), (73, 297122), (133, 163082), (146, 148561), (266, 81541), (511, 42446), (1022, 21223), (1117, 19418), (1387, 15638), (2234, 9709), (2774, 7819)]