21139391

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{233}}^1\times {\mathrm{997}}^1$

素因数の和:1250

約数の個数: 16

約数和(自身を含む): 26155584

約数和(自身を除く): 5016193

約数列:

[1, 7, 13, 91, 233, 997, 1631, 3029, 6979, 12961, 21203, 90727, 232301, 1626107, 3019913, 21139391]

約数ペア:

[(1, 21139391), (7, 3019913), (13, 1626107), (91, 232301), (233, 90727), (997, 21203), (1631, 12961), (3029, 6979)]