21389860

素因数分解:

$2^2\times 5^1\times {\mathrm{59}}^1\times {\mathrm{18127}}^1$

素因数の和:18195

約数の個数: 24

約数和(自身を含む): 45682560

約数和(自身を除く): 24292700

約数列:

[1, 2, 4, 5, 10, 20, 59, 118, 236, 295, 590, 1180, 18127, 36254, 72508, 90635, 181270, 362540, 1069493, 2138986, 4277972, 5347465, 10694930, 21389860]

約数ペア:

[(1, 21389860), (2, 10694930), (4, 5347465), (5, 4277972), (10, 2138986), (20, 1069493), (59, 362540), (118, 181270), (236, 90635), (295, 72508), (590, 36254), (1180, 18127)]