21519673

素因数分解:

$7^2\times {\mathrm{31}}^2\times {\mathrm{457}}^1$

素因数の和:533

約数の個数: 18

約数和(自身を含む): 25923258

約数和(自身を除く): 4403585

約数列:

[1, 7, 31, 49, 217, 457, 961, 1519, 3199, 6727, 14167, 22393, 47089, 99169, 439177, 694183, 3074239, 21519673]

約数ペア:

[(1, 21519673), (7, 3074239), (31, 694183), (49, 439177), (217, 99169), (457, 47089), (961, 22393), (1519, 14167), (3199, 6727)]