18078640

素因数分解:

$2^4\times 5^1\times {\mathrm{225983}}^1$

素因数の和:225996

約数の個数: 20

約数和(自身を含む): 42033024

約数和(自身を除く): 23954384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 225983, 451966, 903932, 1129915, 1807864, 2259830, 3615728, 4519660, 9039320, 18078640]

約数ペア:

[(1, 18078640), (2, 9039320), (4, 4519660), (5, 3615728), (8, 2259830), (10, 1807864), (16, 1129915), (20, 903932), (40, 451966), (80, 225983)]