21355639

素因数分解:

${\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{89}}^1\times {\mathrm{173}}^1$

素因数の和:354

約数の個数: 16

約数和(自身を含む): 23176800

約数和(自身を除く): 1821161

約数列:

[1, 19, 73, 89, 173, 1387, 1691, 3287, 6497, 12629, 15397, 123443, 239951, 292543, 1123981, 21355639]

約数ペア:

[(1, 21355639), (19, 1123981), (73, 292543), (89, 239951), (173, 123443), (1387, 15397), (1691, 12629), (3287, 6497)]