21366820

素因数分解:

$2^2\times 5^1\times {\mathrm{571}}^1\times {\mathrm{1871}}^1$

素因数の和:2451

約数の個数: 24

約数和(自身を含む): 44972928

約数和(自身を除く): 23606108

約数列:

[1, 2, 4, 5, 10, 20, 571, 1142, 1871, 2284, 2855, 3742, 5710, 7484, 9355, 11420, 18710, 37420, 1068341, 2136682, 4273364, 5341705, 10683410, 21366820]

約数ペア:

[(1, 21366820), (2, 10683410), (4, 5341705), (5, 4273364), (10, 2136682), (20, 1068341), (571, 37420), (1142, 18710), (1871, 11420), (2284, 9355), (2855, 7484), (3742, 5710)]