20872208

素因数分解:

$2^4\times 7^1\times {\mathrm{157}}^1\times {\mathrm{1187}}^1$

素因数の和:1359

約数の個数: 40

約数和(自身を含む): 46550592

約数和(自身を除く): 25678384

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 157, 314, 628, 1099, 1187, 1256, 2198, 2374, 2512, 4396, 4748, 8309, 8792, 9496, 16618, 17584, 18992, 33236, 66472, 132944, 186359, 372718, 745436, 1304513, 1490872, 2609026, 2981744, 5218052, 10436104, 20872208]

約数ペア:

[(1, 20872208), (2, 10436104), (4, 5218052), (7, 2981744), (8, 2609026), (14, 1490872), (16, 1304513), (28, 745436), (56, 372718), (112, 186359), (157, 132944), (314, 66472), (628, 33236), (1099, 18992), (1187, 17584), (1256, 16618), (2198, 9496), (2374, 8792), (2512, 8309), (4396, 4748)]