3988840

素因数分解:

$2^3\times 5^1\times {\mathrm{99721}}^1$

素因数の和:99732

約数の個数: 16

約数和(自身を含む): 8974980

約数和(自身を除く): 4986140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 99721, 199442, 398884, 498605, 797768, 997210, 1994420, 3988840]

約数ペア:

[(1, 3988840), (2, 1994420), (4, 997210), (5, 797768), (8, 498605), (10, 398884), (20, 199442), (40, 99721)]