19804915

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{17923}}^1$

素因数の和:17958

約数の個数: 16

約数和(自身を含む): 27101088

約数和(自身を除く): 7296173

約数列:

[1, 5, 13, 17, 65, 85, 221, 1105, 17923, 89615, 232999, 304691, 1164995, 1523455, 3960983, 19804915]

約数ペア:

[(1, 19804915), (5, 3960983), (13, 1523455), (17, 1164995), (65, 304691), (85, 232999), (221, 89615), (1105, 17923)]