21071245

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19069}}^1$

素因数の和:19104

約数の個数: 16

約数和(自身を含む): 28833840

約数和(自身を除く): 7762595

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 19069, 95345, 247897, 324173, 1239485, 1620865, 4214249, 21071245]

約数ペア:

[(1, 21071245), (5, 4214249), (13, 1620865), (17, 1239485), (65, 324173), (85, 247897), (221, 95345), (1105, 19069)]