21506121

素因数分解:

$3^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{8753}}^1$

素因数の和:8782

約数の個数: 32

約数和(自身を含む): 39217920

約数和(自身を除く): 17711799

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 63, 91, 117, 189, 273, 351, 819, 2457, 8753, 26259, 61271, 78777, 113789, 183813, 236331, 341367, 551439, 796523, 1024101, 1654317, 2389569, 3072303, 7168707, 21506121]

約数ペア:

[(1, 21506121), (3, 7168707), (7, 3072303), (9, 2389569), (13, 1654317), (21, 1024101), (27, 796523), (39, 551439), (63, 341367), (91, 236331), (117, 183813), (189, 113789), (273, 78777), (351, 61271), (819, 26259), (2457, 8753)]