21065240

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{3271}}^1$

素因数の和:3312

約数の個数: 64

約数和(自身を含む): 56540160

約数和(自身を除く): 35474920

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 23, 28, 35, 40, 46, 56, 70, 92, 115, 140, 161, 184, 230, 280, 322, 460, 644, 805, 920, 1288, 1610, 3220, 3271, 6440, 6542, 13084, 16355, 22897, 26168, 32710, 45794, 65420, 75233, 91588, 114485, 130840, 150466, 183176, 228970, 300932, 376165, 457940, 526631, 601864, 752330, 915880, 1053262, 1504660, 2106524, 2633155, 3009320, 4213048, 5266310, 10532620, 21065240]

約数ペア:

[(1, 21065240), (2, 10532620), (4, 5266310), (5, 4213048), (7, 3009320), (8, 2633155), (10, 2106524), (14, 1504660), (20, 1053262), (23, 915880), (28, 752330), (35, 601864), (40, 526631), (46, 457940), (56, 376165), (70, 300932), (92, 228970), (115, 183176), (140, 150466), (161, 130840), (184, 114485), (230, 91588), (280, 75233), (322, 65420), (460, 45794), (644, 32710), (805, 26168), (920, 22897), (1288, 16355), (1610, 13084), (3220, 6542), (3271, 6440)]