21365918

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1709}}^1$

素因数の和:1784

約数の個数: 32

約数和(自身を含む): 39398400

約数和(自身を除く): 18032482

約数列:

[1, 2, 7, 14, 19, 38, 47, 94, 133, 266, 329, 658, 893, 1709, 1786, 3418, 6251, 11963, 12502, 23926, 32471, 64942, 80323, 160646, 227297, 454594, 562261, 1124522, 1526137, 3052274, 10682959, 21365918]

約数ペア:

[(1, 21365918), (2, 10682959), (7, 3052274), (14, 1526137), (19, 1124522), (38, 562261), (47, 454594), (94, 227297), (133, 160646), (266, 80323), (329, 64942), (658, 32471), (893, 23926), (1709, 12502), (1786, 11963), (3418, 6251)]