87280

素因数分解:

$2^4\times 5^1\times {\mathrm{1091}}^1$

素因数の和:1104

約数の個数: 20

約数和(自身を含む): 203112

約数和(自身を除く): 115832

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 1091, 2182, 4364, 5455, 8728, 10910, 17456, 21820, 43640, 87280]

約数ペア:

[(1, 87280), (2, 43640), (4, 21820), (5, 17456), (8, 10910), (10, 8728), (16, 5455), (20, 4364), (40, 2182), (80, 1091)]