20961040

素因数分解:

$2^4\times 5^1\times {\mathrm{479}}^1\times {\mathrm{547}}^1$

素因数の和:1039

約数の個数: 40

約数和(自身を含む): 48925440

約数和(自身を除く): 27964400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 479, 547, 958, 1094, 1916, 2188, 2395, 2735, 3832, 4376, 4790, 5470, 7664, 8752, 9580, 10940, 19160, 21880, 38320, 43760, 262013, 524026, 1048052, 1310065, 2096104, 2620130, 4192208, 5240260, 10480520, 20961040]

約数ペア:

[(1, 20961040), (2, 10480520), (4, 5240260), (5, 4192208), (8, 2620130), (10, 2096104), (16, 1310065), (20, 1048052), (40, 524026), (80, 262013), (479, 43760), (547, 38320), (958, 21880), (1094, 19160), (1916, 10940), (2188, 9580), (2395, 8752), (2735, 7664), (3832, 5470), (4376, 4790)]