20381890

素因数分解:

$2^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{22901}}^1$

素因数の和:22997

約数の個数: 16

約数和(自身を含む): 37101240

約数和(自身を除く): 16719350

約数列:

[1, 2, 5, 10, 89, 178, 445, 890, 22901, 45802, 114505, 229010, 2038189, 4076378, 10190945, 20381890]

約数ペア:

[(1, 20381890), (2, 10190945), (5, 4076378), (10, 2038189), (89, 229010), (178, 114505), (445, 45802), (890, 22901)]