21053368

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:500

約数の個数: 64

約数和(自身を含む): 48614400

約数和(自身を除く): 27561032

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 47, 56, 76, 94, 133, 152, 188, 266, 329, 376, 421, 532, 658, 842, 893, 1064, 1316, 1684, 1786, 2632, 2947, 3368, 3572, 5894, 6251, 7144, 7999, 11788, 12502, 15998, 19787, 23576, 25004, 31996, 39574, 50008, 55993, 63992, 79148, 111986, 138509, 158296, 223972, 277018, 375953, 447944, 554036, 751906, 1108072, 1503812, 2631671, 3007624, 5263342, 10526684, 21053368]

約数ペア:

[(1, 21053368), (2, 10526684), (4, 5263342), (7, 3007624), (8, 2631671), (14, 1503812), (19, 1108072), (28, 751906), (38, 554036), (47, 447944), (56, 375953), (76, 277018), (94, 223972), (133, 158296), (152, 138509), (188, 111986), (266, 79148), (329, 63992), (376, 55993), (421, 50008), (532, 39574), (658, 31996), (842, 25004), (893, 23576), (1064, 19787), (1316, 15998), (1684, 12502), (1786, 11788), (2632, 7999), (2947, 7144), (3368, 6251), (3572, 5894)]