20872888

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{47}}^1\times {\mathrm{1291}}^1$

素因数の和:1387

約数の個数: 32

約数和(自身を含む): 40930560

約数和(自身を除く): 20057672

約数列:

[1, 2, 4, 8, 43, 47, 86, 94, 172, 188, 344, 376, 1291, 2021, 2582, 4042, 5164, 8084, 10328, 16168, 55513, 60677, 111026, 121354, 222052, 242708, 444104, 485416, 2609111, 5218222, 10436444, 20872888]

約数ペア:

[(1, 20872888), (2, 10436444), (4, 5218222), (8, 2609111), (43, 485416), (47, 444104), (86, 242708), (94, 222052), (172, 121354), (188, 111026), (344, 60677), (376, 55513), (1291, 16168), (2021, 10328), (2582, 8084), (4042, 5164)]