21681184

素因数分解:

$2^5\times 7^1\times {\mathrm{151}}^1\times {\mathrm{641}}^1$

素因数の和:809

約数の個数: 48

約数和(自身を含む): 49182336

約数和(自身を除く): 27501152

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 56, 112, 151, 224, 302, 604, 641, 1057, 1208, 1282, 2114, 2416, 2564, 4228, 4487, 4832, 5128, 8456, 8974, 10256, 16912, 17948, 20512, 33824, 35896, 71792, 96791, 143584, 193582, 387164, 677537, 774328, 1355074, 1548656, 2710148, 3097312, 5420296, 10840592, 21681184]

約数ペア:

[(1, 21681184), (2, 10840592), (4, 5420296), (7, 3097312), (8, 2710148), (14, 1548656), (16, 1355074), (28, 774328), (32, 677537), (56, 387164), (112, 193582), (151, 143584), (224, 96791), (302, 71792), (604, 35896), (641, 33824), (1057, 20512), (1208, 17948), (1282, 16912), (2114, 10256), (2416, 8974), (2564, 8456), (4228, 5128), (4487, 4832)]