21384513

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{881}}^1$

素因数の和:950

約数の個数: 32

約数和(自身を含む): 33868800

約数和(自身を除く): 12484287

約数列:

[1, 3, 9, 27, 29, 31, 87, 93, 261, 279, 783, 837, 881, 899, 2643, 2697, 7929, 8091, 23787, 24273, 25549, 27311, 76647, 81933, 229941, 245799, 689823, 737397, 792019, 2376057, 7128171, 21384513]

約数ペア:

[(1, 21384513), (3, 7128171), (9, 2376057), (27, 792019), (29, 737397), (31, 689823), (87, 245799), (93, 229941), (261, 81933), (279, 76647), (783, 27311), (837, 25549), (881, 24273), (899, 23787), (2643, 8091), (2697, 7929)]