21140739

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{107}}^1\times {\mathrm{757}}^1$

素因数の和:899

約数の個数: 24

約数和(自身を含む): 31926960

約数和(自身を除く): 10786221

約数列:

[1, 3, 9, 29, 87, 107, 261, 321, 757, 963, 2271, 3103, 6813, 9309, 21953, 27927, 65859, 80999, 197577, 242997, 728991, 2348971, 7046913, 21140739]

約数ペア:

[(1, 21140739), (3, 7046913), (9, 2348971), (29, 728991), (87, 242997), (107, 197577), (261, 80999), (321, 65859), (757, 27927), (963, 21953), (2271, 9309), (3103, 6813)]