21779320

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{28657}}^1$

素因数の和:28687

約数の個数: 32

約数和(自身を含む): 51584400

約数和(自身を除く): 29805080

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 28657, 57314, 114628, 143285, 229256, 286570, 544483, 573140, 1088966, 1146280, 2177932, 2722415, 4355864, 5444830, 10889660, 21779320]

約数ペア:

[(1, 21779320), (2, 10889660), (4, 5444830), (5, 4355864), (8, 2722415), (10, 2177932), (19, 1146280), (20, 1088966), (38, 573140), (40, 544483), (76, 286570), (95, 229256), (152, 143285), (190, 114628), (380, 57314), (760, 28657)]