21761217

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{53}}^1\times {\mathrm{137}}^1$

素因数の和:239

約数の個数: 40

約数和(自身を含む): 34264296

約数和(自身を除く): 12503079

約数列:

[1, 3, 9, 27, 37, 53, 81, 111, 137, 159, 333, 411, 477, 999, 1233, 1431, 1961, 2997, 3699, 4293, 5069, 5883, 7261, 11097, 15207, 17649, 21783, 45621, 52947, 65349, 136863, 158841, 196047, 268657, 410589, 588141, 805971, 2417913, 7253739, 21761217]

約数ペア:

[(1, 21761217), (3, 7253739), (9, 2417913), (27, 805971), (37, 588141), (53, 410589), (81, 268657), (111, 196047), (137, 158841), (159, 136863), (333, 65349), (411, 52947), (477, 45621), (999, 21783), (1233, 17649), (1431, 15207), (1961, 11097), (2997, 7261), (3699, 5883), (4293, 5069)]