21053380

素因数分解:

$2^2\times 5^1\times {\mathrm{647}}^1\times {\mathrm{1627}}^1$

素因数の和:2283

約数の個数: 24

約数和(自身を含む): 44307648

約数和(自身を除く): 23254268

約数列:

[1, 2, 4, 5, 10, 20, 647, 1294, 1627, 2588, 3235, 3254, 6470, 6508, 8135, 12940, 16270, 32540, 1052669, 2105338, 4210676, 5263345, 10526690, 21053380]

約数ペア:

[(1, 21053380), (2, 10526690), (4, 5263345), (5, 4210676), (10, 2105338), (20, 1052669), (647, 32540), (1294, 16270), (1627, 12940), (2588, 8135), (3235, 6508), (3254, 6470)]