21780187

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{223}}^1\times {\mathrm{683}}^1$

素因数の和:930

約数の個数: 16

約数和(自身を含む): 25740288

約数和(自身を除く): 3960101

約数列:

[1, 11, 13, 143, 223, 683, 2453, 2899, 7513, 8879, 31889, 97669, 152309, 1675399, 1980017, 21780187]

約数ペア:

[(1, 21780187), (11, 1980017), (13, 1675399), (143, 152309), (223, 97669), (683, 31889), (2453, 8879), (2899, 7513)]