21354215

素因数分解:

$5^1\times {\mathrm{47}}^1\times {\mathrm{89}}^1\times {\mathrm{1021}}^1$

素因数の和:1162

約数の個数: 16

約数和(自身を含む): 26490240

約数和(自身を除く): 5136025

約数列:

[1, 5, 47, 89, 235, 445, 1021, 4183, 5105, 20915, 47987, 90869, 239935, 454345, 4270843, 21354215]

約数ペア:

[(1, 21354215), (5, 4270843), (47, 454345), (89, 239935), (235, 90869), (445, 47987), (1021, 20915), (4183, 5105)]