21120728

素因数分解:

$2^3\times {\mathrm{421}}^1\times {\mathrm{6271}}^1$

素因数の和:6698

約数の個数: 16

約数和(自身を含む): 39701760

約数和(自身を除く): 18581032

約数列:

[1, 2, 4, 8, 421, 842, 1684, 3368, 6271, 12542, 25084, 50168, 2640091, 5280182, 10560364, 21120728]

約数ペア:

[(1, 21120728), (2, 10560364), (4, 5280182), (8, 2640091), (421, 50168), (842, 25084), (1684, 12542), (3368, 6271)]