18878990

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{11171}}^1$

素因数の和:11204

約数の個数: 24

約数和(自身を含む): 36800568

約数和(自身を除く): 17921578

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 11171, 22342, 55855, 111710, 145223, 290446, 726115, 1452230, 1887899, 3775798, 9439495, 18878990]

約数ペア:

[(1, 18878990), (2, 9439495), (5, 3775798), (10, 1887899), (13, 1452230), (26, 726115), (65, 290446), (130, 145223), (169, 111710), (338, 55855), (845, 22342), (1690, 11171)]