20989612

素因数分解:

$2^2\times 7^1\times {\mathrm{61}}^1\times {\mathrm{12289}}^1$

素因数の和:12361

約数の個数: 24

約数和(自身を含む): 42670880

約数和(自身を除く): 21681268

約数列:

[1, 2, 4, 7, 14, 28, 61, 122, 244, 427, 854, 1708, 12289, 24578, 49156, 86023, 172046, 344092, 749629, 1499258, 2998516, 5247403, 10494806, 20989612]

約数ペア:

[(1, 20989612), (2, 10494806), (4, 5247403), (7, 2998516), (14, 1499258), (28, 749629), (61, 344092), (122, 172046), (244, 86023), (427, 49156), (854, 24578), (1708, 12289)]