21955843

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{181}}^1$

素因数の和:275

約数の個数: 32

約数和(自身を含む): 28700672

約数和(自身を除く): 6744829

約数列:

[1, 7, 13, 31, 43, 91, 181, 217, 301, 403, 559, 1267, 1333, 2353, 2821, 3913, 5611, 7783, 9331, 16471, 17329, 39277, 54481, 72943, 101179, 121303, 241273, 510601, 708253, 1688911, 3136549, 21955843]

約数ペア:

[(1, 21955843), (7, 3136549), (13, 1688911), (31, 708253), (43, 510601), (91, 241273), (181, 121303), (217, 101179), (301, 72943), (403, 54481), (559, 39277), (1267, 17329), (1333, 16471), (2353, 9331), (2821, 7783), (3913, 5611)]