21239511

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{953}}^1$

素因数の和:1015

約数の個数: 32

約数和(自身を含む): 32970240

約数和(自身を除く): 11730729

約数列:

[1, 3, 17, 19, 23, 51, 57, 69, 323, 391, 437, 953, 969, 1173, 1311, 2859, 7429, 16201, 18107, 21919, 22287, 48603, 54321, 65757, 307819, 372623, 416461, 923457, 1117869, 1249383, 7079837, 21239511]

約数ペア:

[(1, 21239511), (3, 7079837), (17, 1249383), (19, 1117869), (23, 923457), (51, 416461), (57, 372623), (69, 307819), (323, 65757), (391, 54321), (437, 48603), (953, 22287), (969, 21919), (1173, 18107), (1311, 16201), (2859, 7429)]