21211356

素因数分解:

$2^2\times 3^1\times {\mathrm{821}}^1\times {\mathrm{2153}}^1$

素因数の和:2981

約数の個数: 24

約数和(自身を含む): 49576464

約数和(自身を除く): 28365108

約数列:

[1, 2, 3, 4, 6, 12, 821, 1642, 2153, 2463, 3284, 4306, 4926, 6459, 8612, 9852, 12918, 25836, 1767613, 3535226, 5302839, 7070452, 10605678, 21211356]

約数ペア:

[(1, 21211356), (2, 10605678), (3, 7070452), (4, 5302839), (6, 3535226), (12, 1767613), (821, 25836), (1642, 12918), (2153, 9852), (2463, 8612), (3284, 6459), (4306, 4926)]