21421284

素因数分解:

$2^2\times 3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1999}}^1$

素因数の和:2072

約数の個数: 48

約数和(自身を含む): 53760000

約数和(自身を除く): 32338716

約数列:

[1, 2, 3, 4, 6, 12, 19, 38, 47, 57, 76, 94, 114, 141, 188, 228, 282, 564, 893, 1786, 1999, 2679, 3572, 3998, 5358, 5997, 7996, 10716, 11994, 23988, 37981, 75962, 93953, 113943, 151924, 187906, 227886, 281859, 375812, 455772, 563718, 1127436, 1785107, 3570214, 5355321, 7140428, 10710642, 21421284]

約数ペア:

[(1, 21421284), (2, 10710642), (3, 7140428), (4, 5355321), (6, 3570214), (12, 1785107), (19, 1127436), (38, 563718), (47, 455772), (57, 375812), (76, 281859), (94, 227886), (114, 187906), (141, 151924), (188, 113943), (228, 93953), (282, 75962), (564, 37981), (893, 23988), (1786, 11994), (1999, 10716), (2679, 7996), (3572, 5997), (3998, 5358)]