20961070

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{79}}^1\times {\mathrm{157}}^1$

素因数の和:269

約数の個数: 48

約数和(自身を含む): 41636160

約数和(自身を除く): 20675090

約数列:

[1, 2, 5, 10, 13, 26, 65, 79, 130, 157, 158, 169, 314, 338, 395, 785, 790, 845, 1027, 1570, 1690, 2041, 2054, 4082, 5135, 10205, 10270, 12403, 13351, 20410, 24806, 26533, 26702, 53066, 62015, 66755, 124030, 132665, 133510, 161239, 265330, 322478, 806195, 1612390, 2096107, 4192214, 10480535, 20961070]

約数ペア:

[(1, 20961070), (2, 10480535), (5, 4192214), (10, 2096107), (13, 1612390), (26, 806195), (65, 322478), (79, 265330), (130, 161239), (157, 133510), (158, 132665), (169, 124030), (314, 66755), (338, 62015), (395, 53066), (785, 26702), (790, 26533), (845, 24806), (1027, 20410), (1570, 13351), (1690, 12403), (2041, 10270), (2054, 10205), (4082, 5135)]