21405656

素因数分解:

$2^3\times {\mathrm{1069}}^1\times {\mathrm{2503}}^1$

素因数の和:3578

約数の個数: 16

約数和(自身を含む): 40189200

約数和(自身を除く): 18783544

約数列:

[1, 2, 4, 8, 1069, 2138, 2503, 4276, 5006, 8552, 10012, 20024, 2675707, 5351414, 10702828, 21405656]

約数ペア:

[(1, 21405656), (2, 10702828), (4, 5351414), (8, 2675707), (1069, 20024), (2138, 10012), (2503, 8552), (4276, 5006)]