18801621

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{2557}}^1$

素因数の和:2625

約数の個数: 24

約数和(自身を含む): 29263520

約数和(自身を除く): 10461899

約数列:

[1, 3, 9, 19, 43, 57, 129, 171, 387, 817, 2451, 2557, 7353, 7671, 23013, 48583, 109951, 145749, 329853, 437247, 989559, 2089069, 6267207, 18801621]

約数ペア:

[(1, 18801621), (3, 6267207), (9, 2089069), (19, 989559), (43, 437247), (57, 329853), (129, 145749), (171, 109951), (387, 48583), (817, 23013), (2451, 7671), (2557, 7353)]