18812915

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{401}}^1\times {\mathrm{853}}^1$

素因数の和:1270

約数の個数: 16

約数和(自身を含む): 24718176

約数和(自身を除く): 5905261

約数列:

[1, 5, 11, 55, 401, 853, 2005, 4265, 4411, 9383, 22055, 46915, 342053, 1710265, 3762583, 18812915]

約数ペア:

[(1, 18812915), (5, 3762583), (11, 1710265), (55, 342053), (401, 46915), (853, 22055), (2005, 9383), (4265, 4411)]