21235743

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{37}}^1\times {\mathrm{733}}^1$

素因数の和:808

約数の個数: 32

約数和(自身を含む): 33470400

約数和(自身を除く): 12234657

約数列:

[1, 3, 9, 27, 29, 37, 87, 111, 261, 333, 733, 783, 999, 1073, 2199, 3219, 6597, 9657, 19791, 21257, 27121, 28971, 63771, 81363, 191313, 244089, 573939, 732267, 786509, 2359527, 7078581, 21235743]

約数ペア:

[(1, 21235743), (3, 7078581), (9, 2359527), (27, 786509), (29, 732267), (37, 573939), (87, 244089), (111, 191313), (261, 81363), (333, 63771), (733, 28971), (783, 27121), (999, 21257), (1073, 19791), (2199, 9657), (3219, 6597)]