20989528

素因数分解:

$2^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{19727}}^1$

素因数の和:19759

約数の個数: 32

約数和(自身を含む): 47347200

約数和(自身を除く): 26357672

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 56, 76, 133, 152, 266, 532, 1064, 19727, 39454, 78908, 138089, 157816, 276178, 374813, 552356, 749626, 1104712, 1499252, 2623691, 2998504, 5247382, 10494764, 20989528]

約数ペア:

[(1, 20989528), (2, 10494764), (4, 5247382), (7, 2998504), (8, 2623691), (14, 1499252), (19, 1104712), (28, 749626), (38, 552356), (56, 374813), (76, 276178), (133, 157816), (152, 138089), (266, 78908), (532, 39454), (1064, 19727)]