21129849

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{1627}}^1$

素因数の和:1686

約数の個数: 32

約数和(自身を含む): 34643840

約数和(自身を除く): 13513991

約数列:

[1, 3, 9, 13, 27, 37, 39, 111, 117, 333, 351, 481, 999, 1443, 1627, 4329, 4881, 12987, 14643, 21151, 43929, 60199, 63453, 180597, 190359, 541791, 571077, 782587, 1625373, 2347761, 7043283, 21129849]

約数ペア:

[(1, 21129849), (3, 7043283), (9, 2347761), (13, 1625373), (27, 782587), (37, 571077), (39, 541791), (111, 190359), (117, 180597), (333, 63453), (351, 60199), (481, 43929), (999, 21151), (1443, 14643), (1627, 12987), (4329, 4881)]