20639864

素因数分解:

$2^3\times 7^1\times {\mathrm{167}}^1\times {\mathrm{2207}}^1$

素因数の和:2387

約数の個数: 32

約数和(自身を含む): 44513280

約数和(自身を除く): 23873416

約数列:

[1, 2, 4, 7, 8, 14, 28, 56, 167, 334, 668, 1169, 1336, 2207, 2338, 4414, 4676, 8828, 9352, 15449, 17656, 30898, 61796, 123592, 368569, 737138, 1474276, 2579983, 2948552, 5159966, 10319932, 20639864]

約数ペア:

[(1, 20639864), (2, 10319932), (4, 5159966), (7, 2948552), (8, 2579983), (14, 1474276), (28, 737138), (56, 368569), (167, 123592), (334, 61796), (668, 30898), (1169, 17656), (1336, 15449), (2207, 9352), (2338, 8828), (4414, 4676)]