21374905

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{3169}}^1$

素因数の和:3264

約数の個数: 16

約数和(自身を含む): 27388800

約数和(自身を除く): 6013895

約数列:

[1, 5, 19, 71, 95, 355, 1349, 3169, 6745, 15845, 60211, 224999, 301055, 1124995, 4274981, 21374905]

約数ペア:

[(1, 21374905), (5, 4274981), (19, 1124995), (71, 301055), (95, 224999), (355, 60211), (1349, 15845), (3169, 6745)]