20129680

素因数分解:

$2^4\times 5^1\times {\mathrm{251621}}^1$

素因数の和:251634

約数の個数: 20

約数和(自身を含む): 46801692

約数和(自身を除く): 26672012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 251621, 503242, 1006484, 1258105, 2012968, 2516210, 4025936, 5032420, 10064840, 20129680]

約数ペア:

[(1, 20129680), (2, 10064840), (4, 5032420), (5, 4025936), (8, 2516210), (10, 2012968), (16, 1258105), (20, 1006484), (40, 503242), (80, 251621)]