81239975

素因数分解:

$5^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{1237}}^1$

素因数の和:1355

約数の個数: 24

約数和(自身を含む): 105002208

約数和(自身を除く): 23762233

約数列:

[1, 5, 25, 37, 71, 185, 355, 925, 1237, 1775, 2627, 6185, 13135, 30925, 45769, 65675, 87827, 228845, 439135, 1144225, 2195675, 3249599, 16247995, 81239975]

約数ペア:

[(1, 81239975), (5, 16247995), (25, 3249599), (37, 2195675), (71, 1144225), (185, 439135), (355, 228845), (925, 87827), (1237, 65675), (1775, 45769), (2627, 30925), (6185, 13135)]