21389950

素因数分解:

$2^1\times 5^2\times {\mathrm{419}}^1\times {\mathrm{1021}}^1$

素因数の和:1452

約数の個数: 24

約数和(自身を含む): 39919320

約数和(自身を除く): 18529370

約数列:

[1, 2, 5, 10, 25, 50, 419, 838, 1021, 2042, 2095, 4190, 5105, 10210, 10475, 20950, 25525, 51050, 427799, 855598, 2138995, 4277990, 10694975, 21389950]

約数ペア:

[(1, 21389950), (2, 10694975), (5, 4277990), (10, 2138995), (25, 855598), (50, 427799), (419, 51050), (838, 25525), (1021, 20950), (2042, 10475), (2095, 10210), (4190, 5105)]