18989973

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{199}}^1\times {\mathrm{461}}^1$

素因数の和:689

約数の個数: 24

約数和(自身を含む): 28828800

約数和(自身を除く): 9838827

約数列:

[1, 3, 9, 23, 69, 199, 207, 461, 597, 1383, 1791, 4149, 4577, 10603, 13731, 31809, 41193, 91739, 95427, 275217, 825651, 2109997, 6329991, 18989973]

約数ペア:

[(1, 18989973), (3, 6329991), (9, 2109997), (23, 825651), (69, 275217), (199, 95427), (207, 91739), (461, 41193), (597, 31809), (1383, 13731), (1791, 10603), (4149, 4577)]