21249680

素因数分解:

$2^4\times 5^1\times {\mathrm{265621}}^1$

素因数の和:265634

約数の個数: 20

約数和(自身を含む): 49405692

約数和(自身を除く): 28156012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 265621, 531242, 1062484, 1328105, 2124968, 2656210, 4249936, 5312420, 10624840, 21249680]

約数ペア:

[(1, 21249680), (2, 10624840), (4, 5312420), (5, 4249936), (8, 2656210), (10, 2124968), (16, 1328105), (20, 1062484), (40, 531242), (80, 265621)]