18827780

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{13259}}^1$

素因数の和:13339

約数の個数: 24

約数和(自身を含む): 40098240

約数和(自身を除く): 21270460

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 13259, 26518, 53036, 66295, 132590, 265180, 941389, 1882778, 3765556, 4706945, 9413890, 18827780]

約数ペア:

[(1, 18827780), (2, 9413890), (4, 4706945), (5, 3765556), (10, 1882778), (20, 941389), (71, 265180), (142, 132590), (284, 66295), (355, 53036), (710, 26518), (1420, 13259)]