18403720321

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{19767691}}^1$

素因数の和:19767724

約数の個数: 12

約数和(自身を含む): 22535168880

約数和(自身を除く): 4131448559

約数列:

[1, 7, 19, 49, 133, 931, 19767691, 138373837, 375586129, 968616859, 2629102903, 18403720321]

約数ペア:

[(1, 18403720321), (7, 2629102903), (19, 968616859), (49, 375586129), (133, 138373837), (931, 19767691)]