21171969

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^1\times {\mathrm{1231}}^1$

素因数の和:1267

約数の個数: 48

約数和(自身を含む): 39325440

約数和(自身を除く): 18153471

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 91, 117, 147, 189, 273, 351, 441, 637, 819, 1231, 1323, 1911, 2457, 3693, 5733, 8617, 11079, 16003, 17199, 25851, 33237, 48009, 60319, 77553, 112021, 144027, 180957, 232659, 336063, 432081, 542871, 784147, 1008189, 1628613, 2352441, 3024567, 7057323, 21171969]

約数ペア:

[(1, 21171969), (3, 7057323), (7, 3024567), (9, 2352441), (13, 1628613), (21, 1008189), (27, 784147), (39, 542871), (49, 432081), (63, 336063), (91, 232659), (117, 180957), (147, 144027), (189, 112021), (273, 77553), (351, 60319), (441, 48009), (637, 33237), (819, 25851), (1231, 17199), (1323, 16003), (1911, 11079), (2457, 8617), (3693, 5733)]