21000824540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{2903}}^1\times {\mathrm{21277}}^1$

素因数の和:24206

約数の個数: 48

約数和(自身を含む): 46714231872

約数和(自身を除く): 25713407332

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 2903, 5806, 11612, 14515, 21277, 29030, 42554, 49351, 58060, 85108, 98702, 106385, 197404, 212770, 246755, 361709, 425540, 493510, 723418, 987020, 1446836, 1808545, 3617090, 7234180, 61767131, 123534262, 247068524, 308835655, 617671310, 1050041227, 1235342620, 2100082454, 4200164908, 5250206135, 10500412270, 21000824540]

約数ペア:

[(1, 21000824540), (2, 10500412270), (4, 5250206135), (5, 4200164908), (10, 2100082454), (17, 1235342620), (20, 1050041227), (34, 617671310), (68, 308835655), (85, 247068524), (170, 123534262), (340, 61767131), (2903, 7234180), (5806, 3617090), (11612, 1808545), (14515, 1446836), (21277, 987020), (29030, 723418), (42554, 493510), (49351, 425540), (58060, 361709), (85108, 246755), (98702, 212770), (106385, 197404)]