18390980

素因数分解:

$2^2\times 5^1\times {\mathrm{157}}^1\times {\mathrm{5857}}^1$

素因数の和:6023

約数の個数: 24

約数和(自身を含む): 38873688

約数和(自身を除く): 20482708

約数列:

[1, 2, 4, 5, 10, 20, 157, 314, 628, 785, 1570, 3140, 5857, 11714, 23428, 29285, 58570, 117140, 919549, 1839098, 3678196, 4597745, 9195490, 18390980]

約数ペア:

[(1, 18390980), (2, 9195490), (4, 4597745), (5, 3678196), (10, 1839098), (20, 919549), (157, 117140), (314, 58570), (628, 29285), (785, 23428), (1570, 11714), (3140, 5857)]